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  • 1
    Call number: ZSP-686-105
    In: Report
    Type of Medium: Monograph available for loan
    Pages: 27 S. : graph. Darst. : 29,5 cm
    ISSN: 0937-1060
    Series Statement: Report / Max-Planck-Institut für Meteorologie 105
    Branch Library: GFZ Library
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  • 2
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    PANGAEA
    In:  Supplement to: Quaas, Martin; Reusch, Thorsten B H; Schmidt, Jörn O; Tahvonen, Olli; Voss, Rüdiger (2016): It is the economy, stupid! Projecting the fate of fish populations using ecological-economic modeling. Global Change Biology, 22(1), 264-270, https://doi.org/10.1111/gcb.13060
    Publication Date: 2023-02-24
    Description: Four marine fish species are among the most important on the world market: cod, salmon, tuna, and sea bass. While the supply of North American and European markets for two of these species - Atlantic salmon and European sea bass - mainly comes from fish farming, Atlantic cod and tunas are mainly caught from wild stocks. We address the question what will be the status of these wild stocks in the midterm future, in the year 2048, to be specific. Whereas the effects of climate change and ecological driving forces on fish stocks have already gained much attention, our prime interest is in studying the effects of changing economic drivers, as well as the impact of variable management effectiveness. Using a process-based ecological-economic multispecies optimization model, we assess the future stock status under different scenarios of change. We simulate (i) technological progress in fishing, (ii) increasing demand for fish, and (iii) increasing supply of farmed fish, as well as the interplay of these driving forces under different sce- narios of (limited) fishery management effectiveness. We find that economic change has a substantial effect on fish populations. Increasing aquaculture production can dampen the fishing pressure on wild stocks, but this effect is likely to be overwhelmed by increasing demand and technological progress, both increasing fishing pressure. The only solution to avoid collapse of the majority of stocks is institutional change to improve management effectiveness significantly above the current state. We conclude that full recognition of economic drivers of change will be needed to successfully develop an integrated ecosystem management and to sustain the wild fish stocks until 2048 and beyond.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Environmental and resource economics 1 (1991), S. 97-117 
    ISSN: 1573-1502
    Keywords: Renewable resources ; pollution control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Notes: Abstract The paper presents a dynamic partial equilibrium model which combines optimal renewable resource harvesting and optimal pollution control. Pollution accumulates as a slowly decaying stock and is assumed to affect the growth and the quality of the renewable resource stock. The aim is to maximize a social welfare functional which gives the present value of the difference between natural resource benefits and pollution control costs. The existence, uniqueness and the dynamic properties of the steady states are investigated. The analysis also gives a general result concerning the steady state of any two state variable optimal control problems.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Biodiversity and conservation 8 (1999), S. 101-117 
    ISSN: 1572-9710
    Keywords: forest economics ; nonmarket values ; renewable resources
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Within the even-aged forestry management regime, the length of the rotation period determines the age class structure of a forest area. In many countries harvesting decisions are made by households that own forest land. This paper discusses how different type of values can be included in a model that aims to explain the household forest owners' harvesting decisions. The model suggests that the in situ or amenity preferences make the forest rotation problem considerably more complex than in the classical rotation models based on maximum sustainable yield or maximization of timber revenues. This extended model is able to explain several empirical findings on harvesting behavior and prices of forest land. The model and its features are compared to certain ecological views on renewable resource management.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International tax and public finance 2 (1995), S. 261-278 
    ISSN: 1573-6970
    Keywords: energy ; fossil fuels ; CO2 tax
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract International CO2 taxation may have major implications for fossil fuel markets. These effects must be taken into account in calculating the net gain from CO2 taxation. The paper assumes that buyers have formed an agency that applies a CO2 tax and sellers are competitive or constitute a resource cartel. When sellers are competitive, buyers' agency may use monopsony power by applying an import tariff. At the resulting time-consistent equilibrium, the sellers lose their resource rent. In contrast, the solution where the sellers' cartel maximizes its profits is time inconsistent. At the time-consistent Nash feedback equilibrium, the seller's monopoly power vanishes asymptotically. The sellers' export fee reduces the buyers' pollution tax. At this equilibrium, the buyers' pollution tax includes an import subsidy, and the tax falls below the present value of the marginal pollution damage. In the Nash feedback equilibrium, higher pollution damage may imply higher initial producer prices, although this effect is always the reverse in the Pareto optimum.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Environmental and resource economics 2 (1992), S. 161-181 
    ISSN: 1573-1502
    Keywords: Pollution contron ; acidification ; acid rain game ; transboundary air pollution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Notes: Abstract Transboundary air pollution is analysed as a dynamic game between Finland and the nearby areas of the Soviet Union. Sulphur emissions are used as the environmental control variables and the acidities of the soils as the state variables. Acidification is consequently considered to be a stock pollutant having long-lasting harmful effects on the environment. The state dynamics consist of two relationships: first, of a sulphur transportation model between the regions and, second, of a model describing how the quality of the soil is affected by sulphur deposition. The countries are assumed to be interested in maximizing the net benefits from pollution control as measured by the impacts on the values of forest growth net of the abatement costs. Cooperative and noncooperative solutions of the game are compared to assess the benefits of bilateral cooperation. Using empirical estimates of abatement costs, acidification dynamics and impacts on forest growth it is shown that cooperation is beneficial to Finland but not to the Soviet Union. Consequently, Finland has to offer monetary compensation to induce her neighbor to invest in environmental protection.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Environmental and resource economics 5 (1995), S. 9-27 
    ISSN: 1573-1502
    Keywords: Pollution control ; CO2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Economics
    Notes: Abstract Economic models which take into account the long-term effects of pollution in the environment specify pollution damage as a function of the accumulated stock. Several economists have proposed another formulation where damage is a function of the time derivative of the pollution stock. This paper considers the intertemporal efficiency implications of this formulation. The first specification is qualitative and the objective functional includes both the rate of change and the level of the pollution stock. The second specification is a stylized climate change model with a linear damage function where damage depends only on the rate of increase in global temperature. The analysis reveals that the efficiency properties of optimal pollution control are very sensitive to this change in the damage function. Intertemporal efficiency may require higher emissions compared with the level which is optimal from the myopic point of view. An increase in the rate of discount typically reduces the optimal emission level.
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 2013-08-01
    Description: This study analyzes the optimal management of Scots pine (Pinus sylvestris L.) stands by applying recent developments in numerical optimization methods and forest production ecology. Our approach integrates a process-based, stand-level growth model and a detailed economic description of stand management. The variables optimized include the initial stand density, the number, timing, type, and intensity of thinnings, and the rotation period. A generalized pattern search is used to maximize the present value of net timber revenue over an infinite time horizon. The model adopts quality pricing, which takes branch size and quality into account, to differentiate among five different timber assortments. The analysis also covers five different site types. The results demonstrate the necessity of optimizing all of the management variables simultaneously. Given a low interest rate, optimized thinning significantly increases the rotation period, volume yield, and economic outcome. At higher interest rates, optimal rotation may be shortest under the least fertile growth conditions. The inclusion of a detailed price structure reveals that previous results concerning sensitivity to timber price and the relationship between maximum sustainable yield and economic solutions do not hold true in models that provide a more realistic description of forest management.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 9
    Publication Date: 2018-01-01
    Description: We study the economics of carbon storage using a model that includes forest size structure and determines the choice between rotation forestry and continuous cover forestry. Optimal harvests may rely solely on thinning, implying infinite rotation and continuous cover forestry, or both thinning and clearcuts, implying finite rotation periods. Given several carbon prices and interest rates, we optimize the timing and intensity of thinnings along with the choice of management regime. In addition to the carbon storage in living trees, we include the carbon dynamics of dead trees and timber products. Forest growth is specified by an empirically validated transition matrix model for Norway spruce (Picea abies (L.) Karst.). The optimization problem is solved in its general dynamic form by applying bilevel optimization with gradient-based interior point methods and a genetic algorithm. Carbon pricing postpones thinnings, increases stand density by directing harvests to larger trees, and typically yields a regime shift from rotation forestry to continuous cover forestry. In continuous cover solutions, the steady-state harvesting interval and the diameter distribution of standing and harvested trees are sensitive to carbon price, implying that carbon pricing increases the sawlog ratio of timber yields. Additionally, we obtain relatively inexpensive stand-level marginal costs of carbon storage.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 10
    Publication Date: 2019-10-01
    Description: The Faustmann–Hartman setup is widely established for specifying the economics of forest values besides timber, but it is criticized as restrictive for capturing diversity values. We show that extending the model to cover diversity attributes, i.e., mixed species and internal heterogeneity within species, is not enough to overcome these restrictions. Additionally, it is necessary to extend forest harvesting regimes to cover thinning, continuous cover forestry, and the management of commercially useless trees. Restrictions in the Faustmann–Hartman setup are first shown analytically with optimized thinning but without tree size structures. The empirical significance of these findings is shown by a model that includes four tree species, tree size structures, an extended set of forest management activities, a detailed description of harvesting costs, and a measure for stand diversity as a key factor behind ecosystem services. We show how an optimal harvesting regime, net revenues, wood output, and stand diversity depend on model flexibility, economic parameters, and the valuation of ecosystem services. In a setup allowing flexible management regimes, the costs of reaching a specified level of ecosystem services are negligible compared with those of the Faustmann–Hartman specification.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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