Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 15
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Challenges and Opportunities for Water of the Rio Grande AgEcon
Rister, M. Edward; Sturdivant, Allen W.; Lacewell, Ronald D.; Michelsen, Ari M..
The Rio Grande has headwaters in Colorado, flows through New Mexico, and serves as the United States.–Mexico border in Texas, emptying into the Gulf of Mexico. Snow melt in Colorado and northern New Mexico constitutes the water river supply for New Mexico and the El Paso region, whereas summer monsoonal flow from the Rio Conchos in Mexico and tributaries, including the Pecos River, provides the Rio Grande flow for southern Texas. The region is mostly semiarid with frequent long-term drought periods but is also characterized by a substantial irrigated agriculture sector and a rapidly growing population. International treaties and interstate compacts provide the rules for allocation of Rio Grande waters between the United States and Mexico and among...
Tipo: Journal Article Palavras-chave: Agriculture; Agricultural economics; Conservation; Irrigation; Natural resources; Renewable resources; Resources; Water; Resource /Energy Economics and Policy; Q5; Q15; Q20; Q25; Q28.
Ano: 2011 URL: http://purl.umn.edu/113529
Imagem não selecionada

Imprime registro no formato completo
Dynamics of Spatial Exploitation: A Metapopulation Approach AgEcon
Sanchirico, James N.; Wilen, James E..
We present a bioeconomic model of a harvesting industry operating over a heterogeneous environment comprised of discrete biological populations interconnected by dispersal processes. The model generalizes the H. S. Gordon [1954]/V. Smith [1968] model of open-access rent dissipation by accounting for intertemporal and spatial "Ricardian" patterns of exploitation. This model yields a simple, but insightful, framework from which one can investigate factors that contribute to the evolution of resource exploitation patterns over space and time. For example, we find that exploitation patterns are driven by biological and fleet dispersal and biological and economic heterogeneity. We conclude that one cannot really understand the biological processes operating in...
Tipo: Working or Discussion Paper Palavras-chave: Renewable resources; Bioeconomics; Spatial modeling; Metapopulation; Environmental Economics and Policy; Q22; R19.
Ano: 2000 URL: http://purl.umn.edu/10513
Imagem não selecionada

Imprime registro no formato completo
Equilibrium management of fisheries with altruistic overlapping generations AgEcon
Ekeland, Ivar; Karp, Larry S.; Sumaila, Ussif Rashid.
We imbed a classic fishery model, where the optimal policy follows a Most Rapid Approach Path to a steady state, into an overlapping generations setting. The current generation discounts future generations’ utility flows at a rate possibly different from the pure rate of time preference used to discount their own utility flows. The resulting model has non-constant discount rates, leading to time inconsistency. The unique Markov Perfect equilibrium to this model has a striking feature: provided that the current generation has some concern for the not-yet born, the equilibrium policy does not depend on the degree of that concern.
Tipo: Working Paper Palavras-chave: Fisheries management; Sustainable development; Renewable resources; Time inconsistency; Hyperbolic discounting; Production Economics; Q01; Q22; C 61.
Ano: 2011 URL: http://purl.umn.edu/123635
Imagem não selecionada

Imprime registro no formato completo
Grazing Fees versus Stewardship on Federal Lands AgEcon
Watts, Myles J.; Shimshack, Jay P.; LaFrance, Jeffrey T..
Livestock grazing on public lands continues to be a source of intense conflict and debate. We analyze this problem using a dynamic game. Low grazing fees let ranchers capture more rent from grazing. This increases the incentive to comply with federally mandated regulations. Optimal grazing contracts therefore include grazing fees that are lower than competitive private rates. The optimal policy also includes random monitoring to prevent strategic learning by cheating ranchers and avoid wasteful efforts to disguise noncompliant behavior. Finally, an optimal policy includes a penalty for cheating beyond terminating the lease. This penalty must be large enough that the rancher who would profit the most from cheating experiences a negative expected net return.
Tipo: Working or Discussion Paper Palavras-chave: Renewable resources; Public lands grazing policy; Optimal contracts; Land Economics/Use.
Ano: 2006 URL: http://purl.umn.edu/7151
Imagem não selecionada

Imprime registro no formato completo
Green Technologies for a More Sustainable Agriculture AgEcon
Hrubovcak, James; Vasavada, Utpal; Aldy, Joseph E..
For U.S. agriculture to continue along a sustainable path of economic development, further production increases must be generated by technologies that are both profitable and more environmentally benign. In this context, we assess the role of these green or sustainable technologies in steering agriculture along a more sustainable path. However, the lack of markets for the environmental attributes associated with green technologies can limit their development. In addition, simply making a technology available does not mean it will be adopted. Experience with green technologies such as conservation tillage, integrated pest management, enhanced nutrient management, and precision agriculture demonstrates that even when technologies are profitable, barriers to...
Tipo: Report Palavras-chave: Sustainable agriculture; Natural capital; Nonrenewable resources; Renewable resources; Environmental services; Green technology; Integrated pest management; Conservation tillage; Enhanced nutrient management; Precision agriculture; Environmental Economics and Policy; Farm Management.
Ano: 1999 URL: http://purl.umn.edu/33721
Imagem não selecionada

Imprime registro no formato completo
Makroökonomische Effekte von nachwachsenden Rohstoffen AgEcon
Nusser, Michael; Sheridan, Patrick; Walz, Rainer; Wydra, Sven; Seydel, Philipp.
The results of a current study point out the macroeconomic effects associated with the use and production of renewable resources (NAWARO) in Germany. It focuses on the direct and indirect employment effects in the NAWARO market segments biofuels, energy/electricity, chemical commodities and materials. Supply quantities of renewable resources and agricultural area in Germany required by the industrial production in the different market segments and associated employment effects in the German agricultural sector are also analyzed. Above all, if Germany succeeds to be a lead market in certain NAWARO market segments while retaining agricultural and industrial value chains in Germany considerable employment potentials emerge.
Tipo: Journal Article Palavras-chave: Renewable resources; New technologies; Employment potentials; Lead markets; Scenarios; Labor and Human Capital; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/96748
Imagem não selecionada

Imprime registro no formato completo
Managing R&D Risk in Renewable Energy AgEcon
Rausser, Gordon C.; Papineau, Maya.
Preliminary Draft
Tipo: Working or Discussion Paper Palavras-chave: Research; Development; Renewable resources; Risk; Public Economics; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008 URL: http://purl.umn.edu/37651
Imagem não selecionada

Imprime registro no formato completo
Mangrove increases resiliency of the French Guiana shrimp fishery facing global warming ArchiMer
Diop, Bassirou; Blanchard, Fabian; Sanz, Nicolas.
This paper deals with the biological, ecological and economic impact of global warming and mangrove habitat availability on the French Guiana shrimp fishery. A dynamic bio-economic model is built by employing a shrimp stock's growth function depending on Sea Surface Temperature (SST) and on mangrove surface. The model is empirically calibrated for the French Guiana shrimp fishery using time series collected over 1995–2011. First, two Cobb-Douglas functions, which describe shrimp's natural growth and harvest, are estimated. Then, a Maximum Economic Yield (MEY) harvest rule, based on the optimization of the net present value derived from fishing, is computed. Three management strategies are compared (Closure, Status Quo management, and MEY) under three...
Tipo: Text Palavras-chave: Renewable resources; Fishery bio-economic model; Global warming; Shrimp; Sea surface temperature; Mangrove.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00455/56672/58537.pdf
Imagem não selecionada

Imprime registro no formato completo
Marine Protected Areas as Fishery Policy: A Discussion of Potential Costs and Benefits AgEcon
Sanchirico, James N..
Marine protected areas (MPAs) are currently receiving considerable attention as a "new" tool to control overexploitation. Many advocates argue that MPAs will provide a plethora of benefits ranging from improved habitat to higher fish stocks with little costs. Fishermen argue, not surprisingly, that the costs resulting from closing areas could be significant and need to be considered in the debate. In this paper, a set of biological, industry, and management hypotheses drawn from the literature analyzing the effects of MPAs are discussed. In doing so, a framework is presented that can be used to assess the expected returns to society from investing in MPAs.
Tipo: Working or Discussion Paper Palavras-chave: Renewable resources; Fisheries; Marine protected areas; No-take zones; Resource /Energy Economics and Policy; Q22; Q28.
Ano: 2000 URL: http://purl.umn.edu/10728
Imagem não selecionada

Imprime registro no formato completo
Maximum Economic Yield Fishery Management in the Face of Global Warming ArchiMer
Diop, Bassirou; Sanz, Nicolas; Junior Duplan, Yves Jamont; Guene, El Hadji Mama; Blanchard, Fabian; Pereau, Jean-christophe; Doyen, Luc.
This paper deals with fishery management in the face of the ecological and economic effects of global warming. To achieve this, a dynamic bioeconomic model and model-based scenarios are considered, in which the stock's growth function depends on the sea surface temperature. The model is empirically calibrated for the French Guiana shrimp fishery using time series collected over the period 1993–2009. Three fishing effort strategies are then compared under two contrasted IPCC climate scenarios (RCP 8.5 and RCP 2.6). A first harvesting strategy maintains the Status Quo in terms of fishing effort. A more ecologically-oriented strategy based on the closure of the fishery is also considered. A third strategy, which relates to Maximum Economic Yield (MEY), is...
Tipo: Text Palavras-chave: Renewable resources; Fishery bioeconomic model; Climate change; Climate scenarios; Adaptation; Shrimp.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00453/56418/58115.pdf
Imagem não selecionada

Imprime registro no formato completo
Policy Endogeneity and the Effects of Trade on the Environment AgEcon
Copeland, Brian R..
This paper reviews recent work on the implications of endogenous policy for the effects of trade on the environment and the sustainability of renewable resource stocks. A recognition that pollution policy is endogenous has had a major impact on the trade and environment literature and has reversed some of the previously established empirical findings. Work on pollution has proceeded faster than work on renewable resources. I suggest some directions for future work in this area.
Tipo: Journal Article Palavras-chave: Pollution; International trade and the environment; Renewable resources; Globalization; Environmental Economics and Policy; International Relations/Trade.
Ano: 2005 URL: http://purl.umn.edu/10196
Imagem não selecionada

Imprime registro no formato completo
Resource Transitions and Energy Gain: Contexts of Organization Ecology and Society
Tainter, Joseph A; USDA Forest Service, Rocky Mountain Research Station; jtainter@fs.fed.us; Allen, T. F. H.; University of Wisconsin-Madison; tfallen@facstaff.wisc.edu; Little, Amanda; University of Wisconsin-Madison; amlittle@students.wisc.edu; Hoekstra, Thomas W; USDA Forest Service, Inventory and Monitoring Institute; thoekstra@fs.fed.us.
Energy gain constrains resource use, social organization, and landscape organization in human and other living systems. Changes in energy gain have common characteristics across living systems. We describe these commonalities in selected case studies involving imperial taxation, fungus-farming ants, and North American beaver, and propose a suite of hypotheses for the organization of systems that subsist on different levels of energy gain. Organizational constraints arising from energy gain predict changes to settlement and organization in postcarbon societies.
Tipo: Peer-Reviewed Reports Palavras-chave: Roman Empire; Beaver; Complexity; Energy; Energy gain; Fungus-farming ants; Leaf-cutting ants; Living systems; Organization; Renewable resources; Resources; Solar energy.
Ano: 2003
Imagem não selecionada

Imprime registro no formato completo
Sequencing Renewables: Groundwater, Recycled Water, and Desalination AgEcon
Roumasset, James A.; Wada, Christopher.
Optimal recycling of minerals can be thought of as an integral part of the theory of the mine. In this paper, we consider the role that wastewater recycling plays in the optimal extraction of groundwater, a renewable resource. We develop a two-sector dynamic optimization model to solve for the optimal trajectories of groundwater extraction and water recycling. For the case of spatially increasing recycling costs, recycled water serves as a supplemental resource in transition to the steady state. For constant unit recycling cost, recycled wastewater is eventually used as a sector-specific backstop for agricultural users, while desalination supplements household groundwater in the steady state. In both cases, recycling water increases welfare by shifting...
Tipo: Conference Paper or Presentation Palavras-chave: Renewable resources; Dynamic optimization; Groundwater allocation; Wastewater reuse; Recycling; Reclamation; Water quality; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q25; Q28; C6.
Ano: 2011 URL: http://purl.umn.edu/103753
Imagem não selecionada

Imprime registro no formato completo
STOFFLICHE NUTZUNG NACHWACHSENDER ROHSTOFFE - MARKT UND VERBRAUCHERAKZEPTANZ AgEcon
Menrad, Klaus.
Paper prepared for presentation at the 14th C.A.R.M.E.N. (Centrales Agrar- Rohstoff-Marketing- und Entwicklungs-Netzwerk) Symposium “Im Kreislauf der Natur – Naturstoffe für die moderne Gesellschaft“ Würzburg (Germany), July 10th to 11th, 2006
Tipo: Conference Paper or Presentation Palavras-chave: Renewable resources; Material use; Germany; Crop Production/Industries; Q27; Q21.
Ano: 2006 URL: http://purl.umn.edu/91138
Imagem não selecionada

Imprime registro no formato completo
West African fish biodiversity reference center: Ghana OceanDocs
Abban, E.K.; Teugels, G.G.; Fermon, V..
Renewable natural resources constitute major sources for socioeconomic development of all developing countries, if they can be con-served, developed and sustainably exploited. For its strategic conservation and sustainable exploitation, biodiversity has to be investigated and documented at various levels and in an internationally accepted manner. However, the human and material resources available in the developing countries are insufficient to under-take the necessary studies, while various forces continue to degrade or erode biodiversity; The obvious solution is through collaboration in research and training.
Tipo: Proceedings Paper Palavras-chave: Biodiversity; Renewable resources; Http://aims.fao.org/aos/agrovoc/c_6502.
Ano: 2000 URL: http://hdl.handle.net/1834/738
Registros recuperados: 15
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional