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  • 2010-2014  (71)
  • 2000-2004  (88)
  • 1995-1999  (64)
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  • 1
    Electronic Resource
    Electronic Resource
    SPATIAL BARRIERS AND INFORMATION PROCESSING IN HOUSING MARKETS: AN EMPIRICAL INVESTIGATION OF THE EFFECTS OF THE CONNECTICUT RIVER ON HOUSING RETURNS (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of regional science 36 (1996), S. 0 
    Details
    ISSN: 1467-9787
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Notes: . Relative to financial securities markets, information is a scarce commodity in real estate markets. If information diffuses quickly in real estate markets, then we can infer that telecommunications play an important role. On the other hand, spatial barriers such as rivers can slow down the assimilation of relevant information if face-to-face contacts are an important source of information. We examine whether and how the Connecticut River (along with bridges) alters the nature and strength of spatial diffusion of information on housing returns. We report strong evidence that the Connecticut River slows down the spatial diffusion of information and that its effects are consistent with face-to-face contact, as opposed to telecommunications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9787.1996.tb01108.x
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  • 2
    Electronic Resource
    Electronic Resource
    Three-dimensional optical trapping and evanescent wave light scattering for direct measurement of long range forces between a colloidal particle and a surface (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 2627-2636 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A novel technique is described to measure weaker long range forces between a single colloidal particle and a flat surface as a function of separation distance. The technique uses a three-dimensional optical trap as a force transducer and evanescent wave light scattering to measure the particle-surface separation distance. The three-dimensional optical trap allows direct manipulation of the particle near the surface, and the measured displacement of the particle from the center of the optical trap determines the force of interaction between the particle and the surface. The particle position is determined by measuring the scattered light from the particle in an evanescent wave created by total internal reflection of a laser beam on the surface. This combination of optical techniques allows forces to be directly measured for smaller particles (∼0.25–5.0 μm) and over a range of forces (∼10−14–10−11 N) than has been previously reported for similar force measurement techniques such as atomic force microscopy and total internal reflection microscopy. The experimental results have been compared with DLVO theory predictions for 1.5 μm silica microspheres interacting with glass in NaCl solutions of known ionic strength. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149820
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  • 3
    Electronic Resource
    Electronic Resource
    Propagation of medium energy electrons (10–20 keV) in carbon dioxide (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 11 (1999), S. 226-234 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Propagation of medium energy electrons (10–20 keV) in carbon dioxide is studied for application to using the Electron Beam Fluorescence (EBF) technique with CO2 as a rarefied gas dynamic diagnostic tool. A collimated (1 mm nominal diameter) electron beam at energies of 10, 15, and 20 keV was injected into a vacuum chamber containing ambient CO2 maintained at pressures of 50, 100, 200, 400, 600, and 800 mTorr. Through deconvolution of recorded two-dimensional images of the emitted fluorescence, the growth of the root-mean-square (rms) radius of the beam was obtained as a function of axial distance. An empirical form of the differential scattering cross section which includes the contributions of both elastic and inelastic collisions between fast electrons and CO2 molecules is used in single scattering, multiple scattering, and scattering envelope models developed for describing the electron distribution along the electron beam. Using these models, the rms radius of the electron beam is calculated and compared with experimental results obtained from imaging of the electron beam fluorescence. It is found that the multiple scattering and envelope models significantly overestimate experimental rms radius data. The single scattering model underestimates radius data at target thickness higher than ∼2 and 4 Torr cm for the 10 and 15 keV beams, respectively. The single scattering model matches well with the 20 keV beam data. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.869918
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  • 4
    Electronic Resource
    Electronic Resource
    Revisions in Repeat-Sales Price Indexes: Here Today, Gone Tomorrow? (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Real estate economics 27 (1999), S. 0 
    Details
    ISSN: 1540-6229
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Price indexes based on the repeat-sales model are revised all the way to the beginning of the sample every time a new quarter of information becomes available. Revisions can adversely affect practitioners. In this paper we examine this revision process both theoretically and empirically. The theory behind the repeat-sales method says that revisions should lower the standard error of the estimated indexes; we prove that, in fact, the revised index is more efficient than the original one. This implies that large samples should make revisions trivial. However, our data, and the Freddie-Fannie data, suggest that revisions are large, insensitive to sample size and systematic; revisions are more likely to be downward than upward. In Los Angeles and Fairfax, revisions are usually downward and statistically significant. This bias in initial repeat-sales estimates is caused by sample selectivity; properties with only one or two years between sales do not appreciate at the same rate as other properties. We hypothesize that these “flips” are improved (possibly cosmetically) between sales. One implication of our analysis is that flips should be removed or downweighted before calculating repeat-sales indexes. The same model estimated without flips appears free of bias. We find small increases in efficiency from adding up to 4,300 observations to a base of 1,200.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1540-6229.00767
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  • 5
    Electronic Resource
    Electronic Resource
    A Semiparametric Method for Estimating Local House Price Indices (2004)
    Boston, USA and Oxford, UK : Blackwell Publishing, Inc.
    Real estate economics 32 (2004), S. 0 
    Details
    ISSN: 1540-6229
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: Spatial autoregressive hedonic models utilize house prices lagged in space and time to produce local house price indices, for example, the spatial and temporal autoregressive (STAR) model might be used this way. This paper complements these models with a semiparametric approach, the Local Regression Model (LRM). The greater flexibility of the LRM may allow it to identify space–time asymmetries missed by other models. The LRM is fitted to 49,511 sales from 1972Q1 to 1991Q2 in Fairfax County, Virginia. The local price indices display plausible and significant variations over space and time. The LRM price indices in selected neighborhoods are shown to differ significantly from those in some other neighborhoods. A new method for estimating standard errors addresses an overlooked problem common to all local price indices: how to evaluate the amount of noise in the estimates. Out-of-sample prediction errors demonstrate that LRM adds significant information to the hedonic model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1080-8620.2004.00086.x
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  • 6
    Electronic Resource
    Electronic Resource
    Imperfect Information and Investor Inferences From Housing Price Dynamics (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Real estate economics 23 (1995), S. 0 
    Details
    ISSN: 1540-6229
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: We examine characteristics of housing price dynamics that may be consistent with rational learning and not simply irrational feedback trading. We find significant patterns of temporal and spatial diffusion that are more amenable to explanations that allow for rational components. First, we execute our tests not simply on housing price changes, but on town-by-town differentials from regional average price changes. Second, we find significant relationships with own and neighboring town differentials, but not with control groups of non-neighboring towns. Third, we find that population density, a proxy for scale economies in information production, accelerates the diffusion process. Test were performed on quarterly data for large samples from Connecticut and the San Francisco area, employing method of moments estimators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1540-6229.00665
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  • 7
    Electronic Resource
    Electronic Resource
    Predicting Spatial Patterns of House Prices Using LPR and Bayesian Smoothing (2002)
    Boston, USA and Oxford, UK : Blackwell Publishers Inc.
    Real estate economics 30 (2002), S. 0 
    Details
    ISSN: 1540-6229
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: This article is motivated by the limited ability of standard hedonic price equations to deal with spatial variation in house prices. Spatial patterns of house prices can be viewed as the sum of many causal factors: Access to the central business district is associated with a house price gradient; access to decentralized employment subcenters causes more localized changes in house prices; in addition, neighborhood amenities (and disamenities) can cause house prices to change rapidly over relatively short distances. Spatial prediction (e.g., for an automated valuation system) requires models that can deal with all of these sources of spatial variation. We propose to accommodate these factors using a standard hedonic framework but incoporating a semiparametric model with structure in the residuals modeled with a partially Bayesian approach. The Bayesian framework enables us to provide complete inference in the form of a posterior distribution for each model parameter. Our model allows prediction at sampled or unsampled locations as well as prediction interval estimates. The nonparametric part of our model allows sufficient flexibility to find substantial spatial variation in house values. The parameters of the kriging model provide further insights into spatial patterns. Out–of–sample mean squared error and related statistics validate the proposed methods and justify their use for spatial prediction of house values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1540-6229.00048
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  • 8
    Electronic Resource
    Electronic Resource
    Movers and Shuckers: Interdependent Prepayment Decisions (2001)
    Boston, USA and Oxford, UK : Blackwell Publishers Inc
    Real estate economics 29 (2001), S. 0 
    Details
    ISSN: 1540-6229
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: We model competing risks of mortgage termination where the borrower faces a repeated choice to continue to pay, refinance the loan, move or default. Most previous empirical work on mortgage prepayment has ignored the distinction between prepayments triggered by refinancing and moving, combining them into a single prepayment rate. We show that financial considerations are the primary drivers of the refinance choice while homeowner characteristics have more influence on the move decision. We demonstrate that these differences are statistically significant and that combining these two distinct choices into a single measure of prepayment shifts coefficients toward zero and produces inaccurate predictions of aggregate termination rates. For example, a combined model underestimates the effect of the market price of the loan on refinancing; it misses entirely the opposite effects of borrower income on moving and refinancing. Our results suggest that existing prepayment models are inconsistent predictors of mobility-driven prepayment and underestimate the effect of market conditions and borrower characteristics on refinancing and housing decisions. Our findings have great significance to mortgage investors because mobility-driven prepayments are likely to be a more significant source of prepayments in thenext decade.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1080-8620.00017
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  • 9
    Electronic Resource
    Electronic Resource
    Variation in routine metabolism of juvenile muskellunge: evidence for seasonal metabolic compensation in fishes (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 56 (2000), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Metabolic rate of age 0 muskellunge Esox masquinongy ranged from 0·10 at 5° C to 0·24 mg O2 g-1 h-1 at 25° C and was significantly higher in spring and autumn than during winter months at comparable water temperatures. Reduced metabolic rate in winter was consistent with the metabolic compensation hypothesis, implying that metabolism of muskellunge varies independently of acclimation temperature and gonadogenesis. Moreover, seasonal variation in metabolic rate has important implications for energy budget studies. Single-season estimates of esocid metabolism may be inadequate to describe annual energy requirements; the magnitude of errors will depend on the time of year metabolic rate was measured. As a result, it is suggested that seasonal variation in metabolic rate be incorporated into energy budget determinations for fishes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2000.tb02108.x
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  • 10
    Electronic Resource
    Electronic Resource
    Frequency-Dependent Optical Constants of Water Ice Obtained Directly from Aerosol Extinction Spectra (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 6317-6326 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100017a010
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