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  • Blackwell Publishing Ltd
  • Annual Reviews
  • 2020-2024  (20)
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  • 1
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    Wind as a main driver of the net ecosystem carbon balance of a semiarid Mediterranean steppe in the South East of Spain (2012)
    Blackwell Publishing Ltd
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: Despite the advance in our understanding of the carbon exchange between terrestrial ecosystems and the atmosphere, semiarid ecosystems have been poorly investigated and little is known about their role in the global carbon balance. We used eddy covariance measurements to determine the exchange of CO2 between a semiarid steppe and the atmosphere over 3 years. The vegetation is a perennial grassland of Stipa tenacissima L. located in the SE of Spain. We examined diurnal, seasonal and interannual variations in the net ecosystem carbon balance (NECB) in relation to biophysical variables. Cumulative NECB was a net source of 65.7, 143.6 and 92.1 g C mˉ2 yrˉ1 for the 3 years studied, respectively. We separated the year into two distinctive periods: dry period and growing season. The ecosystem was a net source of CO2 to the atmosphere, particularly during the dry period when large CO2 positive fluxes of up to 15 μmol mˉ2 sˉ1 were observed in concomitance with large wind speeds. Over the growing season, the ecosystem was a slight sink or neutral with maximum rates of -2.3 μmol mˉ2 sˉ1. Rainfall events caused large fluxes of CO2 to the atmosphere and determined the length of the growing season. In this season, photosynthetic photon flux density controlled day-time NECB just below 1000 μmol mˉ2 sˉ1. The analyses of the diurnal and seasonal data and preliminary geological and gas-geochemical evaluations, including C isotopic analyses, suggest that the CO2 released was not only biogenic but most likely included a component of geothermal origin, presumably related to deep fluids occurring in the area. These results highlight the importance of considering geological carbon sources, as well as the need to carefully interpret the results of eddy covariance partitioning techniques when applied in geologically active areas potentially affected by CO2-rich geofluid circulation.
    Beschreibung: Published
    Beschreibung: 539–554
    Beschreibung: 4.5. Studi sul degassamento naturale e sui gas petroliferi
    Beschreibung: JCR Journal
    Beschreibung: reserved
    Schlagwort(e): alpha grass ; carbon sequestration ; ecosystem respiration ; eddy covariance ; geogas ; geothermal activity ; grasslands ; net ecosystem carbon balance ; 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 2
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    Strain and stress fields in the Southern Apennines (Italy) constrained by geodetic, seismological and borehole data (2012)
    Blackwell Publishing Ltd
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: We present an improved evaluation of the current strain and stress fields in Southern Apennines (Italy) obtained through a careful analysis of geodetic, seismological and borehole data. In particular, our analysis provides an updated comparison between the accrued strain recorded by geodetic data, and the strain released by seismic activity in a region hit by destructive historical earthquakes. To this end, we have used 9 years of GPS observations (2001-2010) from a dense network of permanent stations, a dataset of 73 well constrained stress indicators (borehole breakouts and focal mechanisms of moderate to large earthquakes), and published estimations of the geological strain accommodated by active faults in the region. Although geodetic data are generally consistent with seismic and geologic information, previously unknown features of the current deformation in southern Italy emerge from this analysis. The newly obtained GPS velocity field supports the well-established notion of a dominant NE-SW-oriented extension concentrated in a ~50 km wide belt along the topographic relief of the Apennines, as outlined by the distribution of seismogenic normal faults. Geodetic deformation is, however, non uniform along the belt, with two patches of higher strain-rate and shear stress accumulation in the north (Matese Mountains) and in the south (Irpinia area). Low geodetic strain-rates are found in the Bradano basin and Apulia plateau to the east. Along the Ionian Sea margin of southern Italy, in southern Apulia and eastern Basilicata and Calabria, geodetic velocities indicate NW-SE extension which is consistent with active shallow-crustal gravitational motion documented by geological studies. In the west, along the Tyrrhenian margin of the Campania region, the tectonic geodetic field is disturbed by volcanic processes. Comparison between the magnitude of the geodetic and the seismic strain-rates (computed using a long historical seismicity catalogue) allow detecting areas of high correlation, particularly along the axis of the mountain chain, indicating that most of the geodetic strain is released by earthquakes. This relation does not hold for the instrumental seismic catalogue, as a consequence of the limited time span covered by instrumental data. In other areas (e.g. Murge plateau in central Apulia), where seismicity is very low or absent, the yet appreciable geodetic deformation might be accommodated in aseismic mode. Overall, the excellent match between the stress and the strain-rate directions in much of the Apennines indicates that both earthquakes and ground deformation patterns are driven by the same crustal forces.
    Beschreibung: Published
    Beschreibung: 1270-1282
    Beschreibung: 3.2. Tettonica attiva
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): Satellite geodesy ; Plate motions ; Neotectonics ; Europe ; Apennines ; 04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 3
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    Magma intrusion mechanisms and redistribution of seismogenic stress at Mt. Etna volcano (1997–1998) (2012)
    Blackwell Publishing Ltd
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: Several volcanoes worldwide have shown changes in their stress state as a consequence of the deformation produced by the pressurization of a magmatic body. This study investigates seismic swarms occurring on the western flank of Mt. Etna in January 1997 - January 1998. Integrating seismic observations and geodetic data, we constrained the seismogenic fault system, and on the basis of stress tensor inversion and SHMAX analyses, we infer an inflating pressure source located at 5.5 km b.s.l. beneath the west portion of summit area. Evaluation of Coulomb failure stress (CFS) related to the proposed model, showed how a large part of the seismogenic fault underwent a significant CFS increase (500 kPa). We infer the presence of a sub-vertical faulted region, potentially weak, N50°E oriented beneath the western sector of Mt. Etna. This structure could be brought closer to failure thereby generating seismic swarms as the effect of elastic stress transfer induced by movement and/or overpressure of magmatic masses within the upper crust under the volcano.
    Beschreibung: This research was funded by the INGV–DPC 2007–2009 Agreement (Project V4_Flank).
    Beschreibung: Published
    Beschreibung: 339-348
    Beschreibung: 1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attive
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): Etna ; modelling ; Seismicity ; GPS monitoring ; 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 4
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    Evidence for surface rupture associated with the Mw 6.3 L’Aquila earthquake sequence of April 2009 (central Italy) (2010)
    Blackwell Publishing Ltd
    Details
    Publikationsdatum: 2020-02-24
    Beschreibung: An earthquake of Mw=6.3 struck L’Aquila town (central Italy) on April 6, 2009 rupturing an approximately 18 km long SW-dipping normal fault. The aftershock area extended for a length of more than 35 km and included major aftershocks on April 7 and 9, and thousands of minor events. Surface faulting occurred along the SW-dipping Paganica fault with a continuous extent of ~2.5 km. Ruptures consist of open cracks and vertical dislocations or warps (0.1 maximum throw) with an orientation of N130°-N140°. Small triggered slip and shaking effects also took place along nearby synthetic and antithetic normal faults. The observed limited extent, and small surface displacement, of the Paganica ruptures with respect to the height of the fault scarps and vertical throws of paleoearthquakes along faults in the area, puts the faulting associated with the L’Aquila earthquake in perspective with respect to the maximum expected magnitude, and the regional seismic hazard.
    Beschreibung: In press
    Beschreibung: 3.2. Tettonica attiva
    Beschreibung: JCR Journal
    Beschreibung: open
    Schlagwort(e): 2009 L’Aquila seismic sequence ; co-seismic surface effects ; earthquake geology ; normal faulting earthquake ; Abruzzi, central Apennines ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 5
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    Diffuse hydrothermal methane output and evidence of methanotrophic activity within the soils at Sousaki (Greece) (2011)
    Blackwell Publishing Ltd
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: Methane soil flux measurements have been made in 38 sites at the geothermal system of Sousaki (Greece) with the closed chamber method. Fluxes range from –47.6 to 29,150 mg m-2 d-1 and the diffuse CH4 output of the system has been estimated at 19 t a-1. Contemporaneous CO2 flux measurements showed a moderate positive correlation between CO2 and CH4 fluxes. Comparison of the CO2/CH4 soil flux ratios with the CO2/CH4 ratio of the gases of the main gas manifestations provided evidence for methanotrophic activity within the soil. Laboratory CH4 consumption experiments confirmed the presence of methanotrophic microorganisms in soil samples collected at Sousaki. Consumption was generally in the range from –4.9 to –38.9 pmolCH4 h-1 g-1 but could sometimes reach extremely high values (–33,000 pmolCH4 h-1 g-1.). These results are consistent with recent studies on other geothermal systems that revealed the existence of thermoacidophilic bacteria exerting methanotrophic activity in hot, acid soils, thereby reducing methane emissions to the atmosphere.
    Beschreibung: Published
    Beschreibung: 97–107
    Beschreibung: 4.5. Studi sul degassamento naturale e sui gas petroliferi
    Beschreibung: JCR Journal
    Beschreibung: reserved
    Schlagwort(e): Sousaki ; accumulation chamber ; soil degassing ; hydrothermal systems ; methane output ; methanotrophic activity ; 01. Atmosphere::01.01. Atmosphere::01.01.07. Volcanic effects ; 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry ; 04. Solid Earth::04.08. Volcanology::04.08.01. Gases
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 6
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    EPcrust : A reference crustal model for the European plate (2011)
    Blackwell Publishing Ltd
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: We present a new crustal model for the European plate, derived from collection and critical integration of information selected from the literature. The model covers the whole European plate from North Africa to the North Pole (20N - 90N) and from the Mid-Atlantic Ridge to the Urals (40W - 70E). The chosen parameterization represents the crust in three layers (sediments, upper crust and lower crust), and describes the 3D geometry of the interfaces and seismologically-relevant parameters — isotropic P- and S-wave velocity, plus density — with a resolution of 0.5 × 0.5 degrees on a geographical latitude-longitude grid. We selected global and local models, derived from geological assumptions, active seismic experiments, surface-wave studies, noise correlation, receiver functions. Model EPcrust presents significant advantages with respect to previous models: it covers the whole European plate; it is a complete and internally-consistent model (with all the parameters provided, also for the sedimentary layer); it is reproducible; it is easy to update in the future by adding new contributions; and it is available in a convenient digital format. EPcrust could be used to account for crustal structure in seismic wave propagation modeling at continental scale or to compute linearized crustal corrections in continental-scale seismic tomography, gravity studies, dynamic topography and other applications that require a reliable crustal structure. Because of its resolution, our model is not suited for local-scale studies, such as the computation of earthquake scenarios, where more detailed knowledge of the structure is required. We plan to update the model as new data will become available, and possibly improve its resolution for selected areas in the future.
    Beschreibung: Published
    Beschreibung: 352-364
    Beschreibung: 3.3. Geodinamica e struttura dell'interno della Terra
    Beschreibung: JCR Journal
    Beschreibung: reserved
    Schlagwort(e): Europe ; crust ; crustal properties ; Moho ; 04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous ; 04. Solid Earth::04.01. Earth Interior::04.01.01. Composition and state
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 7
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    Evidence for surface rupture associated with the Mw 6.3 L’Aquila earthquake sequence of April 2009 (central Italy) (2010)
    Blackwell Publishing Ltd
    Details
    Publikationsdatum: 2020-02-24
    Beschreibung: An earthquake of Mw = 6.3 struck L Aquila town (central Italy) on 6 April 2009 rupturing an ~18-km-long SW-dipping normal fault. The aftershock area extended for a length of more than 35 km and included major aftershocks on 7 and 9 April and thousands of minor events. Surface faulting occurred along the SW-dipping Paganica fault with a continuous extent of ~2.5 km. Ruptures consist of open cracks and vertical dislocations or warps (0.1m maximum throw) with an orientation of N130°–140°. Small triggered slip and shaking effects also took place along nearby synthetic and antithetic normal faults. The observed limited extent and small surface displacement of the Paganica ruptures with respect to the height of the fault scarps and vertical throws of palaeo-earthquakes along faults in the area put the faulting associated with the L' Aquila earthquake in perspective with respect to the maximum expected magnitude and the regional seismic hazard.
    Beschreibung: Published
    Beschreibung: 43-51
    Beschreibung: 3.2. Tettonica attiva
    Beschreibung: JCR Journal
    Beschreibung: reserved
    Schlagwort(e): surface faulting from moderate earthquake ; coseismic effects ; L'Aquila earthquake ; cemtral Italy ; 04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 8
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    Geofluids and natural gas in Romania, and the 10th International Conference on Gas Geochemistry (2010)
    Blackwell Publishing Ltd
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    Publikationsdatum: 2017-04-04
    Beschreibung: This thematic issue of Geofluids includes 11 papers representing the three main topics discussed in the 10th edition of the International Conference on Gas Geochemistry (ICGG-10): (i) gas in petroleum systems and seepage, (ii) gas in geothermal systems and volcanoes and (iii) gas, seismicity and geohazards. ICGG-10 was held in 2009 in Romania, a country extraordinarily rich in surface gas manifestations, that offers innumerable opportunities for innovative studies on gas geochemistry. We briefly describe the present knowledge on gases occurring both in petroliferous sedimentary basins and geothermal areas of Romania. The 11 contributions of this special issue, which include data from eight countries, are then summarised. Based on these papers and other works presented at the ICGG-10, we find that significant advances in analytical capabilities, data treating and interpretation have led to innovative insights into the origin, distribution and environmental impact of gases migrating to the Earth’s surface. It is increasingly clear, in particular, that gas geochemistry can be more effective for petroleum exploration, volcano-tectonic, geodynamic and environmental studies, if multiparametric studies are performed and the data are interpreted in the geological context.
    Beschreibung: Published
    Beschreibung: 457-462
    Beschreibung: 4.5. Studi sul degassamento naturale e sui gas petroliferi
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): geothermal gas ; international conference on gas geochemistry ; natural gas ; romania ; seeps ; 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 9
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    Methane emission from natural gas seeps and mud volcanoes in Transylvania (Romania) (2010)
    Blackwell Publishing Ltd
    Details
    Publikationsdatum: 2017-04-04
    Beschreibung: Gas seepage from petroleum basins is the second largest natural source of methane to the atmosphere, after wetlands. The uncertainty in global emission estimates should be reduced by extending the flux database which is fundamental for defining the emission factors and the actual area of seepage adopted for up-scaling. As a contribution to this goal, we report a new seepage data-set for the Transylvanian Basin, one of the largest natural gas producing regions of Europe, that is characterized by the widespread occurrence of natural leakages of gas at the surface, including at least 73 mud volcanoes and gas seeps. In this study, methane flux was measured using closed-chambers, from 12 seepage sites, in correspondence with focused gas vents (mud volcano craters, bubbling pools, and flammable gas leaks), in the soil surrounding the vents, and at 15 sites located far from macroseep zones but close to gas fields. Fluxes from individual vents (macro-seeps) were found to reach orders of kg CH4 m)2 day)1 (up to 12 kg m)2 day)1) and diffuse fluxes from soils (miniseepage) were found to be up to a few g CH4 m)2 day)1. Far from seep zones, positive CH4 fluxes (microseepage) may occur locally, typically on the order of tens to hundreds of mg m)2 day)1. The values, as well as the occurrence of seepage even far from vent zones and in mud volcanoes that are apparently extinct, are coherent with results obtained in other countries. Gas fluxes from macro-seeps and soils may change seasonally, but the interannual variation of the average emission factor was found to be minimal. The total CH4 output for Transylvania macro-seeps is estimated conservatively to be around 680 t year)1; the total geo-CH4 seepage emission from the Transylvania petroleum system could be approximately 40 · 103 t year)1, and at least 100 · 103 t year)1 for all Romanian petroleum systems, that is roughly 10% of the total anthropogenic CH4 emission in the country.
    Beschreibung: Published
    Beschreibung: 463-475
    Beschreibung: 4.5. Studi sul degassamento naturale e sui gas petroliferi
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): gas reservoirs ; methane emissions ; mud volcanoes ; seeps ; Transylvanian Basin ; 04. Solid Earth::04.05. Geomagnetism::04.05.99. General or miscellaneous
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 10
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    Progress in Understanding Harmful Algal Blooms: Paradigm Shifts and New Technologies for Research,Monitoring, and Management (2012)
    Annual Reviews
    In:  EPIC3Annu. Rev. Mar. Sci., Annual Reviews, 4, pp. 143-176
    Details
    Publikationsdatum: 2019-07-17
    Beschreibung: The public health, tourism, fisheries, and ecosystem impacts from harmful algal blooms (HABs) have all increased over the past few decades. This has led to heightened scientific and regulatory attention, and the development of many new technologies and approaches for research and management. This, in turn, is leading to significant paradigm shifts with regard to, e.g.,our interpretation of the phytoplankton species concept (strain variation), the dogma of their apparent cosmopolitanism, the role of bacteria and zooplankton grazing in HABs, and our approaches to investigating the ecological and genetic basis for the production of toxins and allelochemicals. Increasingly,eutrophication and climate change are viewed andmanaged as multifactorial environmental stressors that will further challenge managers of coastal resources and those responsible for protecting human health. Here we review HABscience with an eye toward new concepts and approaches,emphasizing, where possible, the unexpected yet promising new directions that research has taken in this diverse field.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
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  • 11
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    Origin and flux of a gas seep in the Northern Alps (Giswil, Switzerland) (2010)
    Blackwell Publishing Ltd
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    Publikationsdatum: 2017-04-04
    Beschreibung: Natural gas seeps in the Alpine region are poorly investigated. However, they can provide useful information regarding the hydrocarbon potential of sedimentary Alpine units and related geofluid migration, typically controlled by pressurized gas accumulations and tectonics. A gas seep located near Giswil, in the Swiss Northern Alps, was investigated, for the first time, for molecular and isotopic gas composition, methane flux to the atmosphere, and gas flux variations over time. The analyses indicated that the gas was thermogenic (CH4 〉 96%; d13C1: )35.5& to )40.2&) and showed evidence of subsurface petroleum biodegradation (13C-enriched CO2, and very low C3+ concentrations). The source rock in the region is marine Type II kerogen, which is likely the same as that providing thermogenic gas in the nearby Wilen shallow well, close to Lake Sarnen. However, the lack of d13CCO2 and d13C3 data for that well prevented us from determining whether the Wilen and Giswil seeps are fed by the same reservoir and seepage system. Gas fluxes from the Giswil seep, measured using a closedchamber system, were significant and mainly from two major vents. However, a substantial gas exhalation from the soil occurs diffusely in an area of at least 115 m2, leading to a total CH4 output conservatively estimated to be at least 16 tonnes per year. Gas flux variations, monitored over a 1-month period by a special tent and flowmeter, showed not only daily meteorological oscillations, but also an intrinsic ‘pulsation’ with periods of enhanced flux that lasted 2–6 h each, occurring every few days. The pulses are likely related to episodes of gas pressure build-up and discharge along the seepage system. However, to date, no relationship to seismicity in the active Sarnen strike-slip fault system has been established.
    Beschreibung: Published
    Beschreibung: 476-485
    Beschreibung: 4.5. Studi sul degassamento naturale e sui gas petroliferi
    Beschreibung: JCR Journal
    Beschreibung: restricted
    Schlagwort(e): Alps ; isotopes ; methane ; organic geochemistry ; seeps ; Switzerland ; 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
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  • 12
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    Non‐exchangeable stable hydrogen isotope ratios in clay minerals and soil clay fractions: A method test (2022)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2023-01-20
    Beschreibung: Stable hydrogen isotope ratios (δ2H values) in structural hydroxyl groups of pedogenic clay minerals are inherited from the surrounding water at the time of their formation. Only non‐exchangeable H preserves the environmental forensic and paleoclimate information (δ2Hn value). To measure δ2Hn values in structural H of clay minerals and soil clay fractions, we adapted a steam equilibration method by accounting for high hygroscopicity. Our δ2Hn values for USGS57 biotite (−95.3 ± SD 0.9‰) and USGS58 muscovite (30.7 ± 1.4‰) differed slightly but significantly from the reported δ2H values (−91.5 ± 2.4‰ and −28.4 ± 1.6‰), because the minerals contained 1.1%–4.4% of exchangeable H. The low SD of replicate measurements (n = 3) confirmed a high precision. The clay separation method including destruction of Fe oxides, carbonates and soil organic matter, and dispersion did not significantly change the δ2Hn values of five different clay minerals. However, we were unable to remove all organic matter from the soil clay fractions resulting in an estimated bias of 1‰ in two samples and 15‰ in the carbon‐richest sample. Our results demonstrate that δ2Hn values of structural H of clay minerals and soil clay fractions can be reliably measured without interference from atmospheric water and the method used to separate the soil clay fraction. Highlights We tested steam equilibration to determine stable isotope ratios of structural H in clay. Gas‐tight capsule sealing in Ar atmosphere was necessary to avoid remoistening. Our steam equilibration method showed a high accuracy and precision. The clay separation method did not change stable isotope ratios of structural H in clay.
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Schlagwort(e): ddc:549 ; controlled isotope exchange technique ; deuterium ; montmorillonite ; soil clay separation ; soil organic matter removal ; steam equilibration ; structural H ; USGS57 biotite ; vermiculite ; δ2H
    Sprache: Englisch
    Materialart: doc-type:article
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  • 13
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    Potential erodibility of semi‐arid steppe soils derived from aggregate stability tests (2022)
    Koza, Moritz ; Pöhlitz, Julia ; Prays, Aleksey ; [weitere]
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2023-01-26
    Beschreibung: Erosion is a severe threat to the sustainable use of agricultural soils. However, the structural resistance of soil against the disruptive forces steppe soils experience under field conditions has not been investigated. Therefore, 132 topsoils under grass‐ and cropland covering a large range of physico‐chemical soil properties (sand: 2–76%, silt: 18–80%, clay: 6–30%, organic carbon: 7.3–64.2 g kg−1, inorganic carbon: 0.0–8.5 g kg−1, pH: 4.8–9.5, electrical conductivity: 32–946 μS cm−1) from northern Kazakhstan were assessed for their potential erodibility using several tests. An adjusted drop‐shatter method (low energy input of 60 Joule on a 250‐cm3 soil block) was used to estimate the stability of dry soil against weak mechanical forces, such as saltating particles striking the surface causing wind erosion. Three wetting treatments with various conditions and energies (fast wetting, slow wetting, and wet shaking) were applied to simulate different disruptive effects of water. Results indicate that aggregate stability was higher for grassland than cropland soils and declined with decreasing soil organic carbon content. The results of the drop‐shatter test suggested that 29% of the soils under cropland were at risk of wind erosion, but only 6% were at high risk (i.e. erodible fraction 〉60%). In contrast, the fast wetting treatment revealed that 54% of the samples were prone to become “very unstable” and 44% “unstable” during heavy rain or snowmelt events. Even under conditions comparable to light rain events or raindrop impact, 53–59% of the samples were “unstable.” Overall, cropland soils under semi‐arid conditions seem much more susceptible to water than wind erosion. Considering future projections of increasing precipitation in Kazakhstan, we conclude that the risk of water erosion is potentially underestimated and needs to be taken into account when developing sustainable land use strategies. Highlights Organic matter is the important binding agent enhancing aggregation in steppe topsoils. Tillage always declines aggregate stability even without soil organic carbon changes. All croplands soil are prone to wind or water erosion independent of their soil properties. Despite the semi‐arid conditions, erosion risk by water seems higher than by wind.
    Beschreibung: Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347
    Schlagwort(e): ddc:631.4 ; climate change ; land use ; soil organic carbon ; soil texture ; water erosion ; wind erosion
    Sprache: Englisch
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  • 14
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    Vertical SOC distribution and aromatic carbon in centuries old charcoal‐rich Technosols (2022)
    Bonhage, Alexander ; Raab, Thomas ; Schneider, Anna ; [weitere]
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2023-01-21
    Beschreibung: Charcoal‐rich Technosols on century‐old relict charcoal hearths (RCHs) are the subject of ongoing research regarding potential legacy effects that result from historic charcoal production and subsequent charcoal amendments on forest soil properties and forest ecosystems today. RCHs consist mostly of Auh horizons that are substantially enriched in soil organic carbon (SOC), of which the largest part seems to be of pyrogenic origin (PyC). However, the reported range of SOC and PyC contents in RCH soil also suggests that they are enriched in nonpyrogenic SOC. RCH soils are discussed as potential benchmarks for the long‐term influence of biochar amendment and the post‐wildfire influences on soil properties. In this study, we utilised a large soil sample dataset (n = 1245) from 52 RCH sites in north‐western Connecticut, USA, to quantify SOC contents by total element analysis. The contents of condensed highly aromatic carbon as a proxy for black carbon (BC) were predicted by using a modified benzene polycarboxylated acid (BPCA) marker method in combination with diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy‐based partial least square regression (r2 = 0.89). A high vertical spatial sampling resolution allowed the identification of soil organic matter (SOM) enrichment and translocation processes. The results show an average 75% and 1862% increase in TOC and BPCA‐derived carbon, respectively, for technogenic Auh horizons compared to reference soils. In addition to an increase in aromatic properties, increased carboxylic properties of the RCH SOC suggest self‐humification effects of degrading charcoal and thereby the continuing formation of leachable aromatic carbon compounds, which could have effects on pedogenic processes in buried soils. Indeed, we show BPCA‐derived carbon concentrations in intermediate technogenic Cu horizons and buried top/subsoils that suggest vertical translocation of highly aromatic carbon originating in RCH Auh horizons. Topmost Auh horizons showed a gradual decrease in total organic carbon (TOC) contents with increasing depth, suggesting accumulation of recent, non‐pyrogenic SOM. Lower aliphatic absorptions in RCH soil spectra suggest different SOM turnover dynamics compared to reference soils. Furthermore, studied RCH soils featured additional TOC enrichment, which cannot be fully explained now. Highlights BC to TOC ratio and high resolution vertical SOC distribution in 52 RCH sites were studied. RCH soils non‐BC pool was potentially different to reference soils. RCH soils feature TOC accumulation in the topmost horizon. There is BC translocation into buried soils on RCH sites.
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Schlagwort(e): ddc:631.4 ; benzene polycarboxylated acid marker (BPCA) ; black carbon ; charcoal degradation ; charcoal kiln ; pyrogenic carbon ; relict charcoal hearth ; biochar
    Sprache: Englisch
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  • 15
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    The Arctic Ocean’s Beaufort Gyre (2023)
    Annual Reviews
    Details
    Publikationsdatum: 2023-02-28
    Beschreibung: © The Author(s), 2023. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Timmermans, M.-L., & Toole, J. The Arctic Ocean’s Beaufort Gyre. Annual Review of Marine Science, 15(1), (2023): 223-248, https://doi.org/10.1146/annurev-marine-032122-012034.
    Beschreibung: The Arctic Ocean's Beaufort Gyre is a dominant feature of the Arctic system, a prominent indicator of climate change, and possibly a control factor for high-latitude climate. The state of knowledge of the wind-driven Beaufort Gyre is reviewed here, including its forcing, relationship to sea-ice cover, source waters, circulation, and energetics. Recent decades have seen pronounced change in all elements of the Beaufort Gyre system. Sea-ice losses have accompanied an intensification of the gyre circulation and increasing heat and freshwater content. Present understanding of these changes is evaluated, and time series of heat and freshwater content are updated to include the most recent observations.
    Beschreibung: Support was provided by the National Science Foundation Office of Polar Programs and the Office of Naval Research.
    Schlagwort(e): Arctic Ocean ; Beaufort Gyre ; Circulation ; Sea ice ; Freshwater ; Ocean heat content
    Repository-Name: Woods Hole Open Access Server
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  • 16
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    Defining Hydrogeological Site Similarity with Hierarchical Agglomerative Clustering (2022)
    Blackwell Publishing Ltd | Malden, US
    Details
    Publikationsdatum: 2024-02-28
    Beschreibung: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Hydrogeological information about an aquifer is difficult and costly to obtain, yet essential for the efficient management of groundwater resources. Transferring information from sampled sites to a specific site of interest can provide information when site‐specific data is lacking. Central to this approach is the notion of site similarity, which is necessary for determining relevant sites to include in the data transfer process. In this paper, we present a data‐driven method for defining site similarity. We apply this method to selecting groups of similar sites from which to derive prior distributions for the Bayesian estimation of hydraulic conductivity measurements at sites of interest. We conclude that there is now a unique opportunity to combine hydrogeological expertise with data‐driven methods to improve the predictive ability of stochastic hydrogeological models.〈/p〉
    Beschreibung: 〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉〈italic〉Article impact statement〈/italic〉: This article introduces hierarchical clustering as a method for defining a notion of site similarity; the aim of this method is to improve the derivation of prior distributions in Bayesian methods in hydrogeology.〈/p〉
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Beschreibung: https://github.com/GeoStat-Bayesian/geostatDB
    Beschreibung: https://github.com/GeoStat-Bayesian/exPrior
    Beschreibung: https://github.com/GeoStat-Bayesian/siteSimilarity
    Schlagwort(e): ddc:551.49 ; hydrogeological sites ; hydrogeological modeling
    Sprache: Englisch
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  • 17
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    Phaeocystis: A Global Enigma (2024)
    Annual Reviews
    In:  EPIC3Annual Review of Marine Science, Annual Reviews, 16(1), pp. 417-441, ISSN: 1941-1405
    Details
    Publikationsdatum: 2024-03-01
    Beschreibung: The genus Phaeocystis is globally distributed, with blooms commonly occurring on continental shelves. This unusual phytoplankter has two major morphologies: solitary cells and cells embedded in a gelatinous matrix. Only colonies form blooms. Their large size (commonly 2 mm but up to 3 cm) and mucilaginous envelope allow the colonies to escape predation, but data are inconsistent as to whether colonies are grazed. Cultured Phaeocystis can also inhibit the growth of co-occurring phytoplankton or the feeding of potential grazers. Colonies and solitary cells use nitrate as a nitrogen source, although solitary cells can also grow on ammonium. Phaeocystis colonies might be a major contributor to carbon flux to depth, but in most cases, colonies are rapidly remineralized in the upper 300 m. The occurrence of large Phaeocystis blooms is often associated with environments with low and highly variable light and high nitrate levels, with Phaeocystis antarctica blooms being linked additionally to high iron availability. Emerging results indicate that different clones of Phaeocystis have substantial genetic plasticity, which may explain its appearance in a variety of environments. Given the evidence of Phaeocystis appearing in new systems, this trend will likely continue in the near future.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , peerRev
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  • 18
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    Toward an adequate level of detail in flood risk assessments (2023)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2024-01-24
    Beschreibung: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Flood risk assessments require different disciplines to understand and model the underlying components hazard, exposure, and vulnerability. Many methods and data sets have been refined considerably to cover more details of spatial, temporal, or process information. We compile case studies indicating that refined methods and data have a considerable effect on the overall assessment of flood risk. But are these improvements worth the effort? The adequate level of detail is typically unknown and prioritization of improvements in a specific component is hampered by the lack of an overarching view on flood risk. Consequently, creating the dilemma of potentially being too greedy or too wasteful with the resources available for a risk assessment. A “sweet spot” between those two would use methods and data sets that cover all relevant known processes without using resources inefficiently. We provide three key questions as a qualitative guidance toward this “sweet spot.” For quantitative decision support, more overarching case studies in various contexts are needed to reveal the sensitivity of the overall flood risk to individual components. This could also support the anticipation of unforeseen events like the flood event in Germany and Belgium in 2021 and increase the reliability of flood risk assessments.〈/p〉
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Beschreibung: BMBF http://dx.doi.org/10.13039/501100002347
    Beschreibung: Federal Environment Agency http://dx.doi.org/10.13039/501100010809
    Beschreibung: http://howas21.gfz-potsdam.de/howas21/
    Beschreibung: https://www.umwelt.niedersachsen.de/startseite/themen/wasser/hochwasser_amp_kustenschutz/hochwasserrisikomanagement_richtlinie/hochwassergefahren_und_hochwasserrisikokarten/hochwasserkarten-121920.html
    Beschreibung: https://download.geofabrik.de/europe/germany.html
    Beschreibung: https://emergency.copernicus.eu/mapping/list-of-components/EMSN024
    Beschreibung: https://data.jrc.ec.europa.eu/collection/id-0054
    Beschreibung: https://oasishub.co/dataset/surface-water-flooding-footprinthurricane-harvey-august-2017-jba
    Beschreibung: https://www.wasser.sachsen.de/hochwassergefahrenkarte-11915.html
    Schlagwort(e): ddc:551.48 ; decision support ; extreme events ; integrated flood risk management ; risk assessment
    Sprache: Englisch
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  • 19
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    Small lateral air pressure gradients generated by a large chamber system have a strong effect on CO2 transport in soil (2023)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2024-02-09
    Beschreibung: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Gas transport in soils is usually assumed to be purely diffusive, although several studies have shown that non‐diffusive processes can significantly enhance soil gas transport. These processes include barometric air pressure changes, wind‐induced pressure pumping and static air pressure fields generated by wind interacting with obstacles. The associated pressure gradients in the soil can cause advective gas fluxes that are much larger than diffusive fluxes. However, the contributions of the respective transport processes are difficult to separate. We developed a large chamber system to simulate pressure fields and investigate their influence on soil gas transport. The chamber consists of four subspaces in which pressure is regulated by fans that blow air in or out of the chamber. With this setup, we conducted experiments with oscillating and static pressure fields. CO〈sub〉2〈/sub〉 concentrations were measured along two soil profiles beneath the chamber. We found a significant relationship between static lateral pressure gradients and the change in the CO〈sub〉2〈/sub〉 profiles (R〈sup〉2〈/sup〉 = 0.53; 〈italic toggle="no"〉p〈/italic〉‐value 〈2e‐16). Even small pressure gradients between −1 and 1 Pa relative to ambient pressure resulted in an increase or decrease in CO〈sub〉2〈/sub〉 concentrations of 8% on average in the upper soil, indicating advective flow of air in the pore space. Positive pressure gradients resulted in decreasing, negative pressure gradients in increasing CO〈sub〉2〈/sub〉 concentrations. The concentration changes were probably caused by an advective flow field in the soil beneath the chamber generated by the pressure gradients. No effect of oscillating pressure fields was observed in this study. The results indicate that static lateral pressure gradients have a substantial impact on soil gas transport and therefore are an important driver of gas exchange between soil and atmosphere. Lateral pressure gradients in a comparable range can be induced under windy conditions when wind interacts with terrain features. They can also be caused by chambers used for flux measurements at high wind speed or by fans used for head‐space mixing within the chambers, which yields biased flux estimates.〈/p〉
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Schlagwort(e): ddc:631.4 ; advective flux ; chamber flux measurements ; static air pressure fields ; wind‐induced pressure pumping
    Sprache: Englisch
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  • 20
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    Redoxtrons – An experimental system to study redox processes within the capillary fringe (2023)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2023-11-18
    Beschreibung: Spatiotemporal characterisation of the soil redox status within the capillary fringe (CF) is a challenging task. Air‐filled porosities (ε), oxygen concentration (O〈sub〉2〈/sub〉) and soil redox potential (EH) are interrelated soil variables within active biogeochemical domains such as the CF. We investigated the impact of water table (WT) rise and drainage in an undisturbed topsoil and subsoil sample taken from a Calcaric Gleysol for a period of 46 days. We merged 1D (EH and matric potential) and 2D (O〈sub〉2〈/sub〉) systems to monitor at high spatiotemporal resolution redox dynamics within self‐constructed redoxtron housings and complemented the data set by a 3D pore network characterization using X‐ray microtomography (X‐ray μCT). Depletion of O〈sub〉2〈/sub〉 was faster in the organic matter‐ and clay‐rich aggregated topsoil and the CF extended 〉10 cm above the artificial WT. The homogeneous and less‐aggregated subsoil extended only 4 cm above the WT as indicated by ε–O〈sub〉2〈/sub〉–EH data during saturation. After drainage, 2D O〈sub〉2〈/sub〉 imaging revealed a fast aeration towards the lower depths of the topsoil, which agrees with the connected ε derived by X‐ray μCT (ε〈sub〉CT_conn〈/sub〉) of 14.9% of the total porosity. However, small‐scaled anoxic domains with O〈sub〉2〈/sub〉 saturation 〈5% were apparent even after lowering the WT (down to 0.25 cm〈sup〉2〈/sup〉 in size) for 23 days. These domains remained a nucleus for reducing soil conditions (E〈sub〉H〈/sub〉 〈 −100 mV), which made it challenging to characterise the soil redox status in the CF. In contrast, the subsoil aeration reached O〈sub〉2〈/sub〉 saturation after 8 days for the complete soil volume. Values of ε〈sub〉CT_conn〈/sub〉 around zero in the subsoil highlighted that soil aeration was independent of this parameter suggesting that other variables such as microbial activity must be considered when predicting the soil redox status from ε alone. The use of redoxtrons in combination with localised redox‐measurements and image based pore space analysis resulted in a better 2D/3D characterisation of the pore system and related O〈sub〉2〈/sub〉 transport properties. This allowed us to analyse the distribution and activity of microbiological niches highly associated with the spatiotemporal variable redox dynamics in soil environments. Highlights: The time needed to turn from reducing to oxidising (period where all platinum electrodes feature E〈sub〉H〈/sub〉 〉 300 mV) condition differ for two samples with contrasting soil structure. The subsoil with presumably low O〈sub〉2〈/sub〉 consumption rates aerated considerably faster than the topsoil and exclusively by O〈sub〉2〈/sub〉 diffusion through medium‐ and fine‐sized pores. To derive the soil redox status based upon the triplet ε–O〈sub〉2〈/sub〉–E〈sub〉H〈/sub〉 is challenging at present in heterogeneous soil domains and larger soil volumes than 250 cm〈sup〉3〈/sup〉. Undisturbed soil sampling along with 2D/3D redox measurement systems (e.g., redoxtrons) improve our understanding of redox dynamics within the capillary fringe.
    Schlagwort(e): ddc:631.4 ; environmental monitoring ; incubation experiments ; redox processes ; soil reducing conditions ; undisturbed soil ; X‐ray microtomography
    Sprache: Englisch
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  • 21
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    The dilemma of analytical method changes for soil organic carbon in long‐term experiments (2023)
    Blackwell Publishing Ltd | Oxford, UK
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    Publikationsdatum: 2023-11-17
    Beschreibung: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈sec xmlns:mml="http://www.w3.org/1998/Math/MathML" id="ejss13362-sec-1003" xml:lang="en"〉 〈p xml:lang="en"〉Long‐term experiments (LTEs) have provided data to modellers and agronomists to investigate changes and dynamics of soil organic carbon (SOC) under different cropping systems. As treatment changes have occurred due to agricultural advancements, so too have analytical soil methods. This may lead to method bias over time, which could affect the robust interpretation of data and conclusions drawn. This study aims to quantify differences in SOC due to changes in dry combustion methods over time, using soil samples of a LTE established in 1963 that focuses on mineral and organic fertilizer management in the temperate zone of Northeast Germany. For this purpose, 1059 soil samples, collected between 1976 and 2008, have been analysed twice, once with their historical laboratory method right after sampling, and a second time in 2016 when all samples were analysed using the same elementary analyser. In 9 of 11 soil sampling campaigns, a paired 〈italic toggle="no"〉t〈/italic〉‐test provided evidence for significant differences in the historical SOC values when compared with the re‐analysed concentrations of the same LTE sample. In the sampling years 1988 and 2004, the historical analysis obtained about 0.9 g kg〈sup〉−1〈/sup〉 lower SOC compared with the re‐analysed one. For 1990 and 1998, this difference was about 0.4 g kg〈sup〉−1〈/sup〉. Correction factors, an approach often used to correct for different analytical techniques, could only be applied for 5 of 11 sampling campaigns to account for constant and proportional systematic method error. For this particular LTE, the interpretation of SOC changes due to agronomic management (here fertilization) deviates depending on the analytical method used, which may weaken the explanatory power of the historical data. We demonstrate that analytical method changes over time present one of many challenges in the interpretation of time series data of SOC dynamics. Therefore, LTE site managers need to ensure providing all necessary protocols and data in order to retrace method changes and if necessary recalculate SOC.〈/p〉 〈/sec〉〈sec xmlns:mml="http://www.w3.org/1998/Math/MathML" id="ejss13362-sec-0003" xml:lang="en"〉 〈title〉Highlights〈/title〉 〈p xml:lang="en"〉〈list list-type="bullet" id="ejss13362-list-0001"〉 〈list-item id="ejss13362-li-0001"〉〈p〉A total of 1059 LTE soil samples taken between 1976 and 2008 were re‐analysed for SOC in 2016〈/p〉〈/list-item〉 〈list-item id="ejss13362-li-0002"〉〈p〉Several methodological changes for SOC determination led to significant different SOC concentration in the same sample〈/p〉〈/list-item〉 〈list-item id="ejss13362-li-0003"〉〈p〉Interpretation and time series of LTE soil data suffer from consideration of analytical method changes and poor documentation of the same〈/p〉〈/list-item〉 〈list-item id="ejss13362-li-0004"〉〈p〉Soil archive establishment, thorough method protocols and diligent proficiency testing after soil method changes ameliorate the dilemma〈/p〉〈/list-item〉 〈/list〉〈/p〉 〈/sec〉
    Beschreibung: Brandenburger Staatsministerium für Wissenschaft, Forschung und Kultur http://dx.doi.org/10.13039/501100004581
    Beschreibung: Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100004937
    Beschreibung: https://doi.org/10.4228/zalf-acge-b683
    Schlagwort(e): ddc:631.4 ; Bland–Altman ; carbon stocks ; data trueness ; Deming regression ; method bias ; soil archive ; soil survey
    Sprache: Englisch
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  • 22
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    Optimised use of data fusion and memory‐based learning with an Austrian soil library for predictions with infrared data (2023)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2023-12-12
    Beschreibung: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Infrared spectroscopy in the visible to near‐infrared (vis–NIR) and mid‐infrared (MIR) regions is a well‐established approach for the prediction of soil properties. Different data fusion and training approaches exist, and the optimal procedures are yet undefined and may depend on the heterogeneity present in the set and on the considered scale. The objectives were to test the usefulness of partial least squares regressions (PLSRs) for soil organic carbon (SOC), total carbon (C〈sub〉t〈/sub〉), total nitrogen (N〈sub〉t〈/sub〉) and pH using vis–NIR and MIR spectroscopy for an independent validation after standard calibration (use of a general PLSR model) or using memory‐based learning (MBL) with and without spiking for a national spectral database. Data fusion approaches were simple concatenation of spectra, outer product analysis (OPA) and model averaging. In total, 481 soils from an Austrian forest soil archive were measured in the vis–NIR and MIR regions, and regressions were calculated. Fivefold calibration‐validation approaches were carried out with a region‐related split of spectra to implement independent validations with n ranging from 47 to 99 soils in different folds. MIR predictions were generally superior over vis–NIR predictions. For all properties, optimal predictions were obtained with data fusion, with OPA and spectra concatenation outperforming model averaging. The greatest robustness of performance was found for OPA and MBL with spiking with 〈italic toggle="no"〉R〈/italic〉〈sup〉2〈/sup〉 ≥ 0.77 (N), 0.85 (SOC), 0.86 (pH) and 0.88 (C〈sub〉t〈/sub〉) in the validations of all folds. Overall, the results indicate that the combination of OPA for vis–NIR and MIR spectra with MBL and spiking has a high potential to accurately estimate properties when using large‐scale soil spectral libraries as reference data. However, the reduction of cost‐effectiveness using two spectrometers needs to be weighed against the potential increase in accuracy compared to a single MIR spectroscopy approach.〈/p〉
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Schlagwort(e): ddc:631.4 ; data fusion ; independent validation ; infrared spectroscopy ; MBL ; nitrogen ; outer product analysis ; pH ; soil organic carbon ; spiking ; total carbon
    Sprache: Englisch
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  • 23
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    Importance of catchment hydrological processes and calibration of hydrological‐hydrodynamic rainfall‐runoff models in small rural catchments (2023)
    Blackwell Publishing Ltd | Oxford, UK
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    Publikationsdatum: 2024-01-19
    Beschreibung: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉In recent years, many two‐dimensional (2D) hydrodynamic models have been extended to include the direct rainfall method (DRM). This allows their application as a hydrological‐hydrodynamic model for the determination of floodplains in one model system. In previous studies on DRM, the role of catchment hydrological processes (CaHyPro) and its interaction with the calibration process was not investigated in detail. In the present, case‐oriented study, the influence of the spatiotemporal distribution of the processes precipitation and runoff formation in combination with the 2D model HEC‐RAS is investigated. In a further step, a conceptual approach for event‐based interflow is integrated. The study is performed on the basis of a single storm event in a small rural catchment (low mountain range, 38 km〈sup〉2〈/sup〉) in Hesse (Germany). The model results are evaluated against six quality criteria and compared to a simplified baseline model. Finally, the calibrated improved model is contrasted with a calibrated baseline model. The results show the enhancement of the model results due to the integration of the CaHyPro and highlight its interplay with the calibrated model parameters.〈/p〉
    Schlagwort(e): ddc:551.48 ; 2D hydrodynamic modeling ; calibration ; direct rainfall modeling ; hydrological processes ; radar data ; runoff formation
    Sprache: Englisch
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  • 24
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    Designing More Informative Multiple-Driver Experiments (2024)
    Annual Reviews
    In:  EPIC3Annual Review of Marine Science, Annual Reviews, 16(1), pp. 513-536, ISSN: 1941-1405
    Details
    Publikationsdatum: 2024-01-31
    Beschreibung: 〈jats:p〉 For decades, multiple-driver/stressor research has examined interactions among drivers that will undergo large changes in the future: temperature, pH, nutrients, oxygen, pathogens, and more. However, the most commonly used experimental designs—present-versus-future and ANOVA—fail to contribute to general understanding or predictive power. Linking experimental design to process-based mathematical models would help us predict how ecosystems will behave in novel environmental conditions. We review a range of experimental designs and assess the best experimental path toward a predictive ecology. Full factorial response surface, fractional factorial, quadratic response surface, custom, space-filling, and especially optimal and sequential/adaptive designs can help us achieve more valuable scientific goals. Experiments using these designs are challenging to perform with long-lived organisms or at the community and ecosystem levels. But they remain our most promising path toward linking experiments and theory in multiple-driver research and making accurate, useful predictions. 〈/jats:p〉
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , peerRev
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  • 25
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    BODIUM—A systemic approach to model the dynamics of soil functions (2023)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2024-01-26
    Beschreibung: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉The increasing demand for biomass for food, animal feed, fibre and bioenergy requires optimization of soil productivity, while at the same time, protecting other soil functions such as nutrient cycling and buffering, carbon storage, habitat for biological activity and water filter and storage. Therefore, one of the main challenges for sustainable agriculture is to produce high yields while maintaining all the other soil functions. Mechanistic simulation models are an essential tool to fully understand and predict the complex interactions between physical, biological and chemical processes of soils that generate those functions. We developed a soil model to simulate the impact of various agricultural management options and climate change on soil functions by integrating the relevant processes mechanistically and in a systemic way. As a special feature, we include the dynamics of soil structure induced by tillage and biological activity, which is especially relevant in arable soils. The model operates on a 1D soil profile consisting of a number of discrete layers with dynamic thickness. We demonstrate the model performance by simulating crop growth, root growth, nutrient and water uptake, nitrogen cycling, soil organic matter turnover, microbial activity, water distribution and soil structure dynamics in a long‐term field experiment including different crops and different types and levels of fertilization. The model is able to capture essential features that are measured regularly including crop yield, soil organic carbon, and soil nitrogen. In this way, the plausibility of the implemented processes and their interactions is confirmed. Furthermore, we present the results of explorative simulations comparing scenarios with and without tillage events to analyse the effect of soil structure on soil functions. Since the model is process‐based, we are confident that the model can also be used to predict quantities that have not been measured or to estimate the effect of management measures and climate states not yet been observed. The model thus has the potential to predict the site‐specific impact of management decisions on soil functions, which is of great importance for the development of a sustainable agriculture that is currently also on the agenda of the ‘Green Deal’ at the European level.〈/p〉
    Beschreibung: Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347
    Beschreibung: https://git.ufz.de/bodium/bodium_v1.0
    Schlagwort(e): ddc:631.4 ; agriculture ; computational model ; simulation ; soil microbiology ; soil structure ; sustainable soil
    Sprache: Englisch
    Materialart: doc-type:article
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  • 26
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    Temperature and soil moisture change microbial allocation of pesticide‐derived carbon (2023)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2024-03-18
    Beschreibung: 〈title xmlns:mml="http://www.w3.org/1998/Math/MathML"〉Abstract〈/title〉〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Temperature and soil moisture are known to control pesticide mineralization. Half‐life times (DT〈sub〉50〈/sub〉) derived from pesticide mineralization curves generally indicate longer residence times at low soil temperature and moisture but do not consider potential changes in the microbial allocation of pesticide‐derived carbon (C). We aimed to determine carbon use efficiency (CUE, formation of new biomass relative to total C uptake) to better understand microbial utilization of pesticide‐derived C under different environmental conditions and to support the conventional description of degradation dynamics based on mineralization. We performed a microcosm experiment at two MCPA (2‐methyl‐4‐chlorophenoxyacetic acid) concentrations (1 and 20 mg kg〈sup〉−1〈/sup〉) and defined 20°C/pF 1.8 as optimal and 10°C/pF 3.5 as limiting environmental conditions. After 4 weeks, 70% of the initially applied MCPA was mineralized under optimal conditions but MCPA mineralization reached less than 25% under limiting conditions. However, under limiting conditions, an increase in CUE was observed, indicating a shift towards anabolic utilization of MCPA‐derived C. In this case, increased C assimilation implied C storage or the formation of precursor compounds to support resistance mechanisms, rather than actual growth since we did not find an increase in the 〈italic toggle="no"〉tfdA〈/italic〉 gene relevant to MCPA degradation. We were able to confirm the assumption that under limiting conditions, C assimilation increases relative to mineralization and that C redistribution, may serve as an explanation for the difference between mineralization and MCPA dissipation‐derived degradation dynamics. In addition, by introducing CUE to the temperature‐ and moisture‐dependent degradation of pesticides, we can capture the underlying microbial constraints and adaptive mechanisms to changing environmental conditions.〈/p〉
    Beschreibung: 〈p xmlns:mml="http://www.w3.org/1998/Math/MathML" xml:lang="en"〉Changing environmental conditions alter the MCPA degradation dynamics and the allocation of pesticide‐derived carbon to anabolic or catabolic metabolism.〈boxed-text position="anchor" content-type="graphic" id="ejss13417-blkfxd-0001" xml:lang="en"〉 〈graphic position="anchor" id="jats-graphic-1" xlink:href="urn:x-wiley:13510754:media:ejss13417:ejss13417-toc-0001"〉 〈/graphic〉 〈/boxed-text〉〈/p〉
    Beschreibung: Collaborative Research Center 1253 CAMPOS (DFG)
    Beschreibung: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Beschreibung: DFG Priority Program 2322 “Soil System”
    Beschreibung: Ellrichshausen Foundation
    Beschreibung: Research Training Group “Integrated Hydrosystem modeling”
    Beschreibung: https://doi.org/10.5281/zenodo.5081655
    Schlagwort(e): ddc:631.4 ; anabolism ; carbon use efficiency ; catabolism ; effect of soil moisture and temperature ; gene‐centric process model ; MCPA biodegradation
    Sprache: Englisch
    Materialart: doc-type:article
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  • 27
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    Reducing tillage intensity benefits the soil micro‐ and mesofauna in a global meta‐analysis (2022)
    Blackwell Publishing Ltd | Oxford, UK
    Details
    Publikationsdatum: 2024-03-22
    Beschreibung: Soil fauna drives crucial processes of energy and nutrient cycling in agricultural systems, and influences the quality of crops and pest incidence. Soil tillage is the most influential agricultural manipulation of soil structure, and has a profound influence on soil biology and its provision of ecosystem services. The objective of this study was to quantify through meta‐analyses the effects of reducing tillage intensity on density and diversity of soil micro‐ and mesofaunal communities, and how these effects vary among different pedoclimatic conditions and interact with concurrent management practices. We present the results of a global meta‐analysis of available literature data on the effects of different tillage intensities on taxonomic and functional groups of soil micro‐ and mesofauna. We collected paired observations (conventional vs. reduced forms of tillage/no‐tillage) from 133 studies across 33 countries. Our results show that reduced tillage intensity or no‐tillage increases the total density of springtails (+35%), mites (+23%), and enchytraeids (+37%) compared to more intense tillage methods. The meta‐analyses for different nematode feeding groups, life‐forms of springtails, and taxonomic mite groups showed higher densities under reduced forms of tillage compared to conventional tillage on omnivorous nematodes (+53%), epedaphic (+81%) and hemiedaphic (+84%) springtails, oribatid (+43%) and mesostigmatid (+57%) mites. Furthermore, the effects of reduced forms of tillage on soil micro‐ and mesofauna varied with depth, climate and soil texture, as well as with tillage method, tillage frequency, concurrent fertilisation, and herbicide application. Our findings suggest that reducing tillage intensity can have positive effects on the density of micro‐ and mesofaunal communities in areas subjected to long‐term intensive cultivation practices. Our results will be useful to support decision making on the management of soil faunal communities and will facilitate modelling efforts of soil biology in global agroecosystems. HIGHLIGHTS Global meta‐analysis to estimate the effect of reducing tillage intensity on micro‐ and mesofauna Reduced tillage or no‐tillage has positive effects on springtail, mite and enchytraeid density Effects vary among nematode feeding groups, springtail life forms and mite suborders Effects vary with texture, climate and depth and depend on the tillage method and frequency
    Beschreibung: Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347
    Beschreibung: https://doi.org/10.20387/bonares-eh0f-hj28
    Schlagwort(e): ddc:631.4 ; agricultural land use ; conservation agriculture ; conventional agriculture ; soil biodiversity ; soil cultivation
    Sprache: Englisch
    Materialart: doc-type:article
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  • 28
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    Rhythms and Clocks in Marine Organisms (2023)
    Annual Reviews
    In:  EPIC3Annual Review of Marine Science, Annual Reviews, 15(1), pp. 509-538, ISSN: 1941-1405
    Details
    Publikationsdatum: 2024-05-10
    Beschreibung: The regular movements of waves and tides are obvious representations of the oceans’ rhythmicity. But the rhythms of marine life span across ecological niches and timescales, including short (in the range of hours) and long (in the range of days and months) periods. These rhythms regulate the physiology and behavior of individuals, as well as their interactions with each other and with the environment. This review highlights examples of rhythmicity in marine animals and algae that represent important groups of marine life across different habitats. The examples cover ecologically highly relevant species and a growing number of laboratory model systems that are used to disentangle key mechanistic principles. The review introduces fundamental concepts of chronobiology, such as the distinction between rhythmic and endogenous oscillator–driven processes. It also addresses the relevance of studying diverse rhythms and oscillators, as well as their interconnection, for making better predictions of how species will respond to environmental perturbations, including climate change. As the review aims to address scientists from the diverse fields of marine biology, ecology, and molecular chronobiology, all of which have their own scientific terms, we provide definitions of key terms throughout the article.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
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  • 29
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    Digitale Medien
    FROM THE NEW EDITORS (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00527.x
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  • 30
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    Digitale Medien
    THE RELATIONSHIP BETWEEN UNEMPLOYMENT AND UNFILLED VACANCIES IN GREAT BRITAIN: AN EXTENDED JOB-SEARCH, LABOUR TURNOVER VIEW (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper develops a model of the equilibrium unemploymentvacancy relationship, drawing upon concepts in the job searchlabour turnover literature, and uses that model to explain recent shifts in the uv curve for Great Britain. The analysis involves two stages: the estimation of a dynamic employment adjustment equation, and then the solution of the estimated form for the implicit, equilibrium uv relationship at different points in time. In this approach it is possible to attribute shifts in the uv curve to various exogenous factors such as the movement in real wages relative to productivity, external competitiveness, mismatching between jobs and workers, and the replacement ratio.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00531.x
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  • 31
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    Digitale Medien
    SECTORAL AND MACROECONOMIC EFFECTS IN A TWO GOOD OPEN ECONOMY WITH AN INTERMEDIATE INPUT (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: A model of an open economy, in which two goods, a tradeable and a non-tradeable, are distinguished, is constructed. There is also an intermediate input (oil) which is both produced domestically and traded, and which is used as an input in the traded sector. There are two assets, money and internationally traded bonds. In the model the effects of various changes, including an increase in the money supply, and increases in both the world price of, and the domestic output of, oil, are analysed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00522.x
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  • 32
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    Digitale Medien
    GENERALISED RESIDUALS AND HETEROGENEOUS DURATION MODELS: THE EXPONENTIAL CASE (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 35 (1983), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1983.tb00448.x
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    Digitale Medien
    TESTS OF EFFICIENCY AND THE IMPACT OF ‘NEWS’ IN THREE FOREIGN EXCHANGE MARKETS: THE EXPERIENCE OF THE 1920's (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 35 (1983), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1983.tb00451.x
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  • 34
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    Digitale Medien
    A NOTE ON THE WELFARE COST OF PERFECTLY ANTICIPATED INFLATION (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 35 (1983), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1983.tb00447.x
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  • 35
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    Digitale Medien
    LEMONS AND SUPERGAMES (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 35 (1983), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper generalizes an earlier paper by Heal (1976) in which the‘lemons problem’is analysed in an exchange framework over time. Heal showed that the Akerlof (1970) rule that bad goods (lemons) always drive out good may not always be a valid one. Heal's anti-lemons result is also shown to be a Balanced Tempta-Equilibrium (B.T.E.) in the supergame. But it is also shown, paradoxically, that the B.T.E. can itself be dominated by certain strategies, hence there is a direct counterpart to the constituent version of the Lemons Game in its supergame analogue.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1983.tb00446.x
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    Digitale Medien
    ON THE RELATION BETWEEN HICKSIAN SURPLUS AND TRUE COST-OF-LIVING INDICES (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 34 (1982), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This note demonstrates how recent results in the literature on true cost-of-living indices are of direct relevance to attempts to measure Hicks’compensating and equivalent variations because of the close inter-relationship between the Hicksian surplus measures and true (or constant-utility) price indices.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1982.tb00440.x
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    Digitale Medien
    THE DEMAND FOR ENERGY IN THE UNITED KINGDOM (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 34 (1982), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: Interfuel substitution, a priori, seems to be of considerable importance in the economy of the United Kingdom. Consequently, an appropriate model is developed and estimated. All energy sources are demonstrated to be substitutable. Coal is the most price responsive with natural gas, oil and electrical following. The results are not inconsistent with other studies of energy substitution. Moreover, when the issue of the stability of the demand for energy types is considered, the suggestion that the demand for coal, oil, natural gas, and electrical energy have remained virtually constant over the past three decades.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1982.tb00434.x
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    Digitale Medien
    DISPLACEMENT AND SKILLCENTRE TRAINING: AN ANALYSIS OF FIRM AND TRAINEE CHARACTERISTICS (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 34 (1982), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1982.tb00435.x
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  • 39
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    Digitale Medien
    THE CAUSES OF INTER-REGIONAL LABOUR FORCE MIGRATION IN GREAT BRITAIN (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 33 (1981), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1981.tb00173.x
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  • 40
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    Digitale Medien
    REGIONAL DIFFERENCES IN INDUSTRIAL STRUCTURE: A NOTE (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 33 (1981), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1981.tb00172.x
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  • 41
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    A NOTE ON EMPLOYMENT SUBSIDIES AND THE GOVERNMENT BUDGET CONSTRAINT IN A CLOSED ECONOMY (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 33 (1981), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1981.tb00165.x
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  • 42
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    Digitale Medien
    EUROPEAN MONETARY UNION AND THE DEMAND FOR INTERNATIONAL RESERVES: A COMMENT (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 33 (1981), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1981.tb00168.x
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    Digitale Medien
    STRIKE FREQUENCY AND INDUSTRIAL WAGE DIFFERENTIALS: AN ECONOMETRIC STUDY OF BRITISH PRODUCTION INDUSTRIES (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 32 (1980), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1980.tb00158.x
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  • 44
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    Digitale Medien
    THE INFLUENCE OF THE UNITED KINGDOM'S PUBLIC SECTOR DEFICIT ON ITS MONEY STOCK, 1963–76: SOME COMMENTS (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 32 (1980), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1980.tb00164.x
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    Digitale Medien
    A GENERAL MODEL OF WAGE DETERMINATION (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 32 (1980), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1980.tb00151.x
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    Digitale Medien
    SOCIAL CHOICE AND RANKED INDIVIDUAL PREFERENCES (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 32 (1980), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1980.tb00155.x
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  • 47
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    Digitale Medien
    FURTHER IMPLICATIONS OF LEARNING BY DOING: THE EFFECT OF POPULATION ON PER-CAPITA INCOME (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00528.x
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    Digitale Medien
    FROM THE NEW EDITORS (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00520.x
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    Digitale Medien
    AN EMPIRICAL ANALYSIS OF THE DEGREE OF MONOPOLY THEORY OF DISTRIBUTION (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00525.x
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    Digitale Medien
    PUBLIC SECTOR PRICES AND THE REAL EXCHANGE-RATE IN THE UK RECESSION (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 35 (1983), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1983.tb00450.x
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    THE INFORMATION CONTENT OF THE UK MONETARY COMPONENTS AND AGGREGATES (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 35 (1983), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1983.tb00444.x
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    THE KINKED DEMAND MODEL AND LIMIT PRICING (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 34 (1982), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1982.tb00441.x
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    THE EMPIRICAL RELATIONSHIP BETWEEN THE MONEY STOCK AND THE PRICE LEVEL IN THE UK: A TEST OF CAUSALITY (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 34 (1982), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1982.tb00433.x
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    THE U-V METHOD OF CATEGORIZING THE UNEMPLOYED: AN AMENDMENT (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 34 (1982), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1982.tb00437.x
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    REDUNDANCY IN THE TEXTILE INDUSTRY —A CASE STUDY ANALYSIS OF MALE MANUAL VOLUNTARY QUITS (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 32 (1980), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1980.tb00163.x
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    EXPORT CONTROL IN A HECKSCHER-OHLIN-SAMUELSON MODEL OF TRADE WITH NONTRADED GOODS (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 32 (1980), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1980.tb00153.x
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    THE MULTIPRODUCT DEPOSITORY FIRM, INTEREST-BEARING TRANSACTION BALANCES, INTEREST-BEARING RESERVES, AND UNCERTAINTY (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: In this paper a model of depository firm behavior is developed in which the depository institution acts as a multiple product producer. The multi-product model is an application of the general theory of value to the particular case of depository firms. It generalizes the theory of bank behavior to include production and cost aspects of banking activity as well as its financial aspects and reconciles the rivaling intermediary and firm-theoretic views on depository institutions. By so doing, it bridges the gap between models which treat depository firms as mere portfolio holders and those which analyze the check clearance function in isolation. Risk aversion, production function constraint, jointness, and multiple sources of uncertainty are simultaneously introduced. The model is used to analyze the effects of interest payment on transaction balances, interest payment on reserves of depository institutions by the Central bank, and the Central bank policy swings.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00532.x
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    TESTING FOR UNBIASEDNESS AND EFFICIENCY UNDER INCOMPLETE CURRENT INFORMATION (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00521.x
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    THE SHORT-RUN EFFECTS OF FISCAL POLICY WITH USEFUL GOVERNMENT EXPENDITURE (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 36 (1984), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper examines the short-run effects of changing government expenditure on output, consumption and employment. It attempts to combine the Public-Finance and macroeconomic approaches to the analysis of fiscal policy by introducing government expenditure which is ‘useful’ in consumption into an ISLM-type macro model which is derived from the singleperiod maximizing decisions of households and firms and which includes a government budget constraint.The principal conclusion is that the effects of fiscal policy on output and employment depend on the ‘efficiency’ of government expenditure. The more efficiently government expenditure meets consumption needs, the less effective is fiscal policy to the point where the fiscal-policy multiplier may be negative.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1984.tb00526.x
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    ENDOGENOUS POPULATION GROWTH IN AN OVERLAPPING GENERATIONS MODEL WITH INTERNATIONAL LENDING AND BORROWING (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 35 (1983), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: In this paper population growth is the outcome of a utility maximizing process undertaken by each working generation. This is distinct from the usual treatment of population growth as an exogenous variable. Steady state growth paths are analysed, and the model is extended to allow for international lending and borrowing. The results obtained broadly correspond to the case of a given rate of increase of population, but under certain assumptions it is found that a capital importing country will have a faster rate of growth as a result of being able to borrow on international capital markets.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1983.tb00443.x
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    TESTING FOR CONTEMPORANEOUS CORRELATION OF DISTURBANCES IN SYSTEMS OF REGRESSION EQUATIONS (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 34 (1982), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1982.tb00438.x
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    MODELLING HABIT PERSISTENCE (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 34 (1982), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: The purpose of this paper is to derive the demand functions corresponding to an intertemporal linear expenditure system in which goods are durable, and in which there are penalty costs for changes in planned stocks. Taste changes over time can be interpreted as changes in the technology converting goods into characteristics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1982.tb00442.x
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    POVERTY IN YORK: A RE-ANALYSIS OF ROWNTREE'S 1950 SURVEY (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 33 (1981), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1981.tb00171.x
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    THE INDICATOR SYSTEM AND U.K. MONETARY POLICY (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 33 (1981), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1981.tb00175.x
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    UNIVERSITY SALARIES IN THE U.K.: A STUDY OF LOCAL VARIATIONS WITHIN A NATIONAL PAY STRUCTURE (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 33 (1981), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1981.tb00166.x
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    ON KEYNESIAN ECONOMICS AND THE ECONOMICS OF KEYNES: A SUGGESTED INTERPRETATION (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 33 (1981), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1981.tb00170.x
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    MONETARY UNION AND THE DEMAND FOR INTERNATIONAL RESERVES (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 32 (1980), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1980.tb00161.x
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    EUROPEAN MONETARY UNION AND THE DEMAND FOR INTERNATIONAL RESERVES: A NOTE (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 32 (1980), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-8586.1980.tb00154.x
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    Partial Delegation in a Model of Currency Crisis (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper shows that, in a fixed exchange-rate system with an escape clause, delegating the decision on the magnitude of realignment to an inflation-averse central banker reduces the range of realignment costs for which the policy-maker necessarily devalues. Stressing the influence of devaluation expectations on currency crises, it is also shown that this strategy of delegation reduces the width of the multiple equilibria zone within which self-fulfilling crises occur, thus promoting further the exchange-rate system's stability. The higher the central banker's degree of inflation aversion, the greater is this reduction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00180
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    Testing for Temporal Asymmetry in the Price-Volume Relationship (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper presents some evidence for the presence of temporal asymmetry in the price-volume relationship in the crude oil futures market. By using threshold models we show that there is bidirectional causality between volume and prices, whereas the conventional model that assumes symmetry can only detect unidirectional causality. The results also show that the price-volume relationship is asymmetric, in the sense that negative price and volume changes have stronger effects (on each other) than positive changes. Some explanations for asymmetry in the price-volume relationship are suggested.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00182
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    A Note on the Most-Favoured-Customer Pricing Policy (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper extends the retroactive most-favoured-customer pricing policy examined by Cooper (1986). He showed that the policy enabled both firms in a duopoly to offer higher prices and to enjoy higher profits. This paper introduces a variable into the most-favoured-customer pricing policy. Then, it shows that there is an equilibrium in which the duopolists can further increase their profits.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00184
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    The Favourite-Longshot Bias, Bookmaker Margins and Insider Trading in a Variety of Betting Markets (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper verifies the existence of the favourite-longshot bias in a variety of sports betting markets where odds are set by bookmakers, but the precise pattern of the bias is not identical. Evidence is found to support a central prediction of the Shin (1993) model, which asserts that bookmakers are impelled to create a bias in their odds because of the presence of insider traders: that margins increase with the number of competitors.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00174
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    The Endowment Effect and the Role of Uncertainty (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: This paper explains the endowment effect, whereby sellers generally demand considerably more for a good than buyers are prepared to pay, and related anomalies. Many decisions, including nominating buying or selling prices, involve uncertainty, and we assert that people experience negative psychological reactions to uncertainty. These reactions can affect a person's valuation of the various options, biasing the person's actions towards the status quo, thus producing the endowment effect. Our model also proposes positive or negative reactions to unlikely prospects, which are able to explain commonly observed behaviour in the presence of ambiguity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00176
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    Nash Equilibria in Pure Strategies (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: We consider an n-person non-zero-sum non-cooperative game in normal form, where the strategy sets are some closed intervals of the real line. It is shown that if the pay-off functions are continuous on the whole space and if for each pay-off function the smallest local maximum in the strategy variable is a global maximum, then the game possesses a pure strategy Nash equilibrium.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00178
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    The Reverse Favourite–longshot Bias and Market Efficiency in Major League Baseball: An Update (2003)
    Oxford, UK and Boston, USA : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: Racetrack and sports betting markets have been researched extensively with respect to the question of market efficiency. In contrast to the consistently observed favourite–longshot bias found in racetrack betting markets, it has been shown that gamblers in the market for Major League Baseball games reveal the opposite behaviour. This paper updates the previous study with ten years of additional data for the 1990–99 seasons. The strength of the reverse favourite–longshot bias is virtually identical to the original paper. The result suggests that, contrary to most reported inefficiencies in gambling markets, this bias appears to be permanent.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00165
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    Multivariate Markov Switching Common Factor Models for the UK (2003)
    Oxford, UK and Boston, USA : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: We estimate a model that incorporates two key features of business cycles, comovement among economic variables and switching between regimes of boom and slump, to quarterly UK data for the last four decades. A common factor, interpreted as a composite indicator of coincident variables, and estimates of turning points from one regime to the other, are extracted from the data by using the Kalman filter and maximum likelihood estimation. Both comovement and regime switching are found to be important features of the UK business cycle. The composite indicator produces a sensible representation of the cycle and the estimated turning points agree fairly well with independently determined chronologies. These estimates are sharper than those produced by a univariate Markov switching model of GDP alone. A fairly typical stylized fact of business cycles is confirmed by this model – recessions are steeper and shorter than recoveries.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00168
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    The Interaction Between Efficiency Wage Theories and Labour Turnover Costs (2003)
    Oxford, UK and Boston, USA : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: We develop a simple model to illustrate how the effects of turnover costs on wages can be reinforced by an efficiency wage effect. The insider–outsider theory explains why labour turnover costs allow the insiders to earn higher wages than outsiders. According to the efficiency wage theory, higher wages enhance the insiders’ productivity. Therefore, the costs of replacing an insider by a low–paid, low–productivity outsider are increased, which allows the insiders to raise their wages further. Again, higher wages increase insiders’ productivity, which allows them to earn still higher wages, and so on. Thus, the existence of a link between effort and wages can reinforce the effects of labour turnover costs on wages.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00170
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    Wage Bargaining Versus Efficiency Wages: A Synthesis (2003)
    Oxford, UK and Boston, USA : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: We construct a model integrating the efficiency wage model of Shapiro–Stiglitz (1984) (SS), with an individual wage bargaining model in the Diamond–Mortensen–Pissarides (DMP) tradition where firms and workers form pairwise matches. We show that when workers may threaten to shirk on the job and there is individual wage bargaining, the wage is always higher and employment lower than in either the SS model, or the (appropriately modified) DMP model. When firms determine workers’ efforts unilaterally, efforts are set inefficiently low in the SS model. In the bargaining model, effort is higher, and is first best when the worker non–shirking constraint does not bind. The overall equilibrium allocation may then be more or less efficient than in the SS model, but is always less efficient than in a pure bargaining model with no moral hazard.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00159
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    Some Fiscal Implications of Monetary Policy (2003)
    Oxford, UK and Boston, USA : Blackwell Publishing Ltd
    Bulletin of economic research 55 (2003), S. 0 
    Details
    ISSN: 1467-8586
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Wirtschaftswissenschaften
    Notizen: We study the implications of alternative monetary targeting procedures for real interest rates and economic activity. We find that countercyclical monetary policy rules lead to higher real interest rates, higher average tax rates, lower output but lower variability of tax rates and consumption relative to procyclical rules. For a country with a high level of public debt (e.g. Italy), the adoption of a countercyclical procedure such as interest rate pegging may conceivably raise public debt servicing costs by more than half a percentage point of GNP. Our analysis suggests that the current debate on the targeting procedures of the European Central Bank ought to be broadened to include a discussion of the fiscal implications of monetary policy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/1467-8586.00160
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    SPATIAL INTERACTION ANALYSIS (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01046.x
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    LARGE-LOT ZONING AS SECOND-BEST POLICY (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01049.x
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  • 82
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    Digitale Medien
    BOOK REVIEWS (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Notizen: Book Reviews in This Article. Dynamics of Urban Development, by L. H. Klaassen, W. T. M. Molle, and J. H. P. Paelinck (eds.). British Regional Development since World War I, by Christopher M. Law. Nonmetropolitan America in Transition, by Amos H. Hawley and Sara Mills Mazie (eds.). Revitalizing Cities, by H. Briavel Holcomb and Robert A. Beauregard. Gentrification Amid Urban Decline: Strategies for America's Older Cities, by Michael H. Lang. Migration and Economic Growth in the United States. National, Regional, and Metropolitan Perspectives, by Michael J. Greenwood. Land Office Business, Land and Housing Prices in Rapidly Growing Metropolitan Areas, by Gary Sands. Energy Forecasting for Planners: Transportation Models, by W. Patrick Beaton, Jon H. Weyland, and Nancy Neuman. The City: Patterns and Processes in the Urban Ecosystem, by Christopher Exline, Gary L. Peters, and Robert P. Larkin.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01026.x
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  • 83
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    Digitale Medien
    CITY SIZE DISTRIBUTIONS AND URBAN DENSITY FUNCTIONS: SOME INTERRELATIONSHIPS (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 23 (1983), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1983.tb00991.x
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  • 84
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    Digitale Medien
    SYMPOSIUM ON LOCATION PROBLEMS: IN MEMORY OF LEON COOPER (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01031.x
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  • 85
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    Digitale Medien
    THE DIRECTION OF MIGRATION: A DYNAMIC GENERAL EQUILIBRIUM MODEL (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01044.x
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  • 86
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    Digitale Medien
    BOOKS RECEIVED (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01051.x
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  • 87
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    Digitale Medien
    BOOKS RECEIVED (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01041.x
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  • 88
    Digitale Medien
    Digitale Medien
    SPECIFICATION TESTS AND MODEL SELECTION FOR AGGREGATE SPATIAL INTERACTION: AN EMPIRICAL COMPARISON (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01015.x
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  • 89
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    Digitale Medien
    THE ONE-DIMENSIONAL SINGLE FACILITY MAXIMIN DISTANCE LOCATION PROBLEM (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 23 (1983), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1983.tb00799.x
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  • 90
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    Digitale Medien
    CALIBRATION OF RESIDENTIAL LOCATION MODELS FOR A MULTIPLANT FIRM (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01021.x
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  • 91
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    Digitale Medien
    SELECTED TITLES FROM CURRENT JOURNALS (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb00817.x
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  • 92
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    Digitale Medien
    URBAN BOUND MIGRATION AND RURAL INVESTMENT: THE CASE OF MEXICO (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 23 (1983), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1983.tb00782.x
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  • 93
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    Digitale Medien
    A DUAL APPROACH FOR OBTAINING LOWER BOUNDS TO THE WEBER PROBLEM (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01033.x
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  • 94
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    Digitale Medien
    ON A FOUNDATION OF THE ECONOMIC THEORY OF LOCATION—TRANSPORT DISTANCE vs. TECHNOLOGICAL SUBSTITUTION (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01035.x
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  • 95
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    Digitale Medien
    PRICING IN AN URBAN SPATIAL MONOPOLY: A REPLY (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 24 (1984), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1984.tb01039.x
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  • 96
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    Digitale Medien
    ARE REGIONAL SHARE EFFECTS CONSTANT OVER TIME? (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 21 (1981), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1981.tb00692.x
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  • 97
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    Digitale Medien
    FISCAL INCIDENCE: A REVISION OF BENEFITS INCIDENCE ESTIMATES (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 21 (1981), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1981.tb00695.x
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  • 98
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    Digitale Medien
    ESTIMATION OF THE ELASTICITIES OF FACTOR SUBSTITUTION IN URBAN BUS TRANSPORTATION: A COST FUNCTION APPROACH (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 21 (1981), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1981.tb00698.x
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  • 99
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    Digitale Medien
    THE EFFECTS OF INTERNAL MIGRATION ON REGIONAL WAGE AND UNEMPLOYMENT DISPARITIES IN CANADA (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 21 (1981), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1981.tb00680.x
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  • 100
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    Digitale Medien
    MOVING BACK vs. MOVING ON: THE CONCEPT OF HOME IN THE DECISION TO REMIGRATE (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 22 (1982), S. 0 
    Details
    ISSN: 1467-9787
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geographie , Wirtschaftswissenschaften
    Notizen: “Is there a human being who does not revere his homeland, even though he may not return?” (Jimmie Durham, Cherokee Indian)
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9787.1982.tb00734.x
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