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	Provedor de dados AgEcon (11) Autor Sedjo, Roger A. (3) Antonelli, Gervasio (1) Araujo-Enciso, Sergio Rene (1) Bischi, Gian Italo (1) Fischer, Carolyn (1) Goetzl, Alberto (1) Ilkilic, Rahmi (1) Kan, Iddo (1) Lamantia, Fabio (1) Leizarowitz, Arie (1) Lyon, Kenneth S. (1) Sanchirico, James N. (1) Sohngen, Brent (1) Tsur, Yacov (1) Wilen, James E. (1) Ylkilic, Rahmi (1) Zhao, Jingang (1) Mais... Palavra-chave C62 (11) Resource /Energy Economics and Policy (8) Q21 (3) Q23 (3) Research Methods/ Statistical Methods (3) C72 (2) Centrality Measures (2) D85 (2) Institutional and Behavioral Economics (2) Nash Equilibrium (2) Networks (2) Projections (2) Q22 (2) Timber models (2) Bioeconomic models (1) Bioeconomics (1) C15 (1) C18 (1) C61 (1) C71 (1) Mais... Tipo do documento Working or Discussion Paper (10) Conference Paper or Presentation (1) Ano 2011 (1) 2009 (1) 2008 (2) 2007 (1) 2005 (1) 1998 (2) 1997 (1) 1996 (2) Mais... País United States (11) Idioma Inglês (11)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 11 Primeira ... 1 ... Última A Comparison of Timber Models for Use in Public Policy Analysis AgEcon Sohngen, Brent; Sedjo, Roger A.. In this paper, we compare and contrast two types of timber models that have been used for public policy analysis. These models have been variously used to predict price, inventory and market welfare impacts under different exogenous forces that impact timber markets. The framework and theory for each model type is presented and discussed. We then thoroughly test the two model types across six potential exogenous shocks to timber markets, ranging from instantaneous demand shocks to gradual supply adjustments. Our comparison indicates that these models predict potentially important differences in timber market behavior. These differences are important to consider for those who do public policy analysis. Tipo: Working or Discussion Paper Palavras-chave: Timber markets; Models; Dynamic adjustment; Optimization; Resource /Energy Economics and Policy; C62; Q21; Q23. Ano: 1996 URL: http://purl.umn.edu/10467 Cournot Competition on a Network of Markets and Firms AgEcon Ilkilic, Rahmi. Suppose markets and firms are connected in a bi-partite network, where firms can only supply to the markets they are connected to. Firms compete a la Cournot and decide how much to supply to each market they have a link with. We assume that markets have linear demand functions and firms have convex quadratic cost functions. We show there exists a unique equilibrium in any given network of firms and markets. We provide a formula which expresses the quantities at an equilibrium as a function of a network centrality measure. Tipo: Working or Discussion Paper Palavras-chave: Cournot Markets; Networks; Nash Equilibrium; Centrality Measures; Institutional and Behavioral Economics; C62; C72; D85; L11. Ano: 2009 URL: http://purl.umn.edu/50679 DYNAMIC-SPATIAL MANAGEMENT OF COASTAL AQUIFERS AgEcon Kan, Iddo; Leizarowitz, Arie; Tsur, Yacov. We analyze the management of a coastal aquifer under seawater intrusion using distributed control methods. The aquifer's state is taken as the water head elevation, which varies with time and in space since extraction, natural recharge and lateral water flows vary with time and in space. The water head, in turn, induces a temporal-spatial seawater intrusion process, which changes the volume of fresh water in the aquifer. Under reasonable conditions we show that the optimal state converges to a steady state process that is constant in time. We characterize the optimal steady state process in terms of a standard control problem (in space) and offer a tractable algorithm to solve for it. Tipo: Working or Discussion Paper Palavras-chave: Distributed control; Groundwater; Optimal exploitation; Seawater intrusion; Resource /Energy Economics and Policy; C61; C62; Q25. Ano: 2007 URL: http://purl.umn.edu/7131 Marine Reserves: Is There a Free Lunch? AgEcon Sanchirico, James N.; Wilen, James E.. This paper employs a spatial and intertemporal model of renewable resource exploitation to investigate the effects of marine reserve creation. The model combines the H. S. Gordon/Vernon Smith hypothesis of a rent dissipation process with Ricardian notions that resources are exploited across space in a pattern dependent upon relative profitabilities. The metapopulation model employed here incorporates modern biological ideas that stress patch heterogeneity, linkages, and dispersal processes between patches. The spatial bioeconomic model is then used to simulate the effects of reserve creation under various ecological structures. We find, under certain parameter configurations and ecological linkages, that there is potential for a "double-dividend" where... Tipo: Working or Discussion Paper Palavras-chave: Marine reserves; Spatial and intertemporal modeling; Bioeconomics; Resource /Energy Economics and Policy; C62; Q22; R10. Ano: 1998 URL: http://purl.umn.edu/10715 Mathematical Bioeconomic Modelling of the Interaction Between Aquaculture and Open Sea Fisheries AgEcon Antonelli, Gervasio; Bischi, Gian Italo; Lamantia, Fabio. We analyze the problem of an integrated management of fisheries by using fish farming as a tool for restocking fish populations depleted by overfishing pressure. We first use a simple heuristic dynamic model, taken from a classical example of mathematical bioeconomics, in order to prove that fish restocking may be an efficient tool for sustainable fishery management in situations where excessive fishing effort is going to cause irreversible stock collapse. Then we propose a two-compartments bieconomic mathematical model, with age structure and age specific harvesting and restocking, to mimic integrated interactions between aquaculture and open sea fisheries, where reared fish are used as substitutes for marine catches. The model proposed in this paper... Tipo: Conference Paper or Presentation Palavras-chave: Dynamical systems; Bioeconomic models; Fisheries; Livestock Production/Industries; Resource /Energy Economics and Policy; C62; Q22. Ano: 2005 URL: http://purl.umn.edu/56001 Models Needed to Assist in the Development of a National Fiber Supply Strategy for the 21st Century: Report of a Workshop AgEcon Sedjo, Roger A.; Goetzl, Alberto. This discussion paper reports on a Workshop on Wood Fiber Supply Modeling held October 3-4, 1996 in Washington, DC. The purpose of this discussion paper is to provide an overview of some of the modeling work being done related to timber supply modeling and some of the issues related to the more useful application of wood fiber supply and projections models. This paper includes brief presentations of three commonly used long-term timber projections and forecasting models: the Timber Assessment Market Model (TAMM) of the Forest Service; the Cintrafor Global Trade Model (CGTM) of the University of Washington; and the Timber Supply Model (TSM) of Resources for the Future. Also, issues related to the useful of the models are addressed as well as a discussion of... Tipo: Working or Discussion Paper Palavras-chave: Timber models; Market forecasting models; Wood fiber supply; Projections; Resource /Energy Economics and Policy; C62; Q21; Q23. Ano: 1997 URL: http://purl.umn.edu/10486 Network of Commons AgEcon Ylkilic, Rahmi. A tragedy of the commons appears when the users of a common resource have incentives to exploit it more than the socially efficient level. We analyze the situation when the tragedy of the commons is embedded in a network of users and sources. Users play a game of extractions, where they decide how much resource to draw from each source they are connected to. We show that if the value of the resource to the users is linear, then each resource exhibits an isolated problem. There exists a unique equilibrium. But when the users have concave values, the network structure matters. The exploitation at each source depends on the centrality of the links connecting the source to the users. The equilibrium is unique and we provide a formula which expresses the... Tipo: Working or Discussion Paper Palavras-chave: Tragedy of the Commons; Networks; Nash Equilibrium; Efficiency; Centrality Measures; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy; C62; C72; D85; Q20. Ano: 2008 URL: http://purl.umn.edu/6221 Once-and-for-All Costs and Exhaustible Resource Markets AgEcon Fischer, Carolyn. This paper analyzes the impact on exhaustible resource markets of setup or shut-down costs, a sparsely analyzed category of nonconvex production technologies. This paper proves that, even under idealized circumstances for competition, a competitive equilibrium will fail to exist in the presence of setup costs, for any utility and cost functions such that a planner would exploit exhaustible resource pools sequentially. Tipo: Working or Discussion Paper Palavras-chave: Natural resources; Setup costs; Shutdown costs; Nonconvexities; Competitive equilibrium; Resource /Energy Economics and Policy; Q3; C62. Ano: 1998 URL: http://purl.umn.edu/10623 The Maximal Payoff and Coalition Formation in Coalitional Games AgEcon Zhao, Jingang. This paper first establishes a new core theorem using the concept of generated payoffs: the TU (transferable utility) core is empty if and only if the maximum of generated payoffs (mgp) is greater than the grand coalition’s payoff v(N), or if and only if it is irrational to split v(N). It then provides answers to the questions of what payoffs to split, how to split the payoff, what coalitions to form, and how long each of the coalitions will be formed by rational players in coalitional TU games. Finally, it obtains analogous results in coalitional NTU (non-transferable utility) games. Tipo: Working or Discussion Paper Palavras-chave: Coalition Formation; Core; Maximal Payoff; Minimum No-Blocking Payoff; Institutional and Behavioral Economics; Research Methods/ Statistical Methods; C62; C71. Ano: 2008 URL: http://purl.umn.edu/6298 The Takayama and Judge Price and Allocation Models and its application in non-linear Price Transmission Analysis Approaches AgEcon Araujo-Enciso, Sergio Rene. Tipo: Working or Discussion Paper Palavras-chave: Demand and Price Analysis; Research Methods/ Statistical Methods; C15; C18; C62. Ano: 2011 URL: http://purl.umn.edu/103432 Timber Supply Model 96: A Global Timber Supply Model with a Pulpwood Component AgEcon Sedjo, Roger A.; Lyon, Kenneth S.. This study involves an update of our earlier Timber Supply Model, which was fully developed in our book, The Adequacy Of Global Timber Supply by Sedjo and Lyon (1990), published by Resources for the Future. The new version, called Timber Supply Model 1996 (TSM96), uses an economic market supply/demand approach to project an intertemporal time path of the world's price and output level of industrial wood. As did the original TSM, the TSM96 provides projections of the time path of the equilibrium output levels of the several regions into which the world has been subdivided. A major new feature of TSM96 is that industrial wood, treated as homogeneous in the earlier study, has be subdivided into two different wood types -- pulpwood and solidwood. The supply of... Tipo: Working or Discussion Paper Palavras-chave: Timber models; Markets; Optimal control; Projections; Timber supply; Resource /Energy Economics and Policy; C62; Q21; Q23. Ano: 1996 URL: http://purl.umn.edu/10696 Registros recuperados: 11 Primeira ... 1 ... Última

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