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| Registros recuperados: 60 | |
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| Myyra, Sami; Pietola, Kyosti. |
| This article solves and characterizes optimal decision rules to invest in irreversible land improvements conditional on land tenure insecurity. Economic model is a normative dynamic programming model with known parameter for the one period returns and transition equations. The decision rules are solved numerically conditional on alternative scenarios on the likelihood that the lease contract and, thus, farmer access to land is either renewed or expires. The model parameters represent Finnish soil quality and production conditions. The results suggest that irreversible land improvements decrease quickly and the yields decline gradually when the farmer is confronted with land tenure insecurity caused by uncertain renewal of the lease contract. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agriculture; Dynamic programming; Land Economics/Use; Q15; Q21. |
| Ano: 2005 |
URL: http://purl.umn.edu/24633 |
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| Lippert, Christian. |
| In the past decade several certification schemes have been developed in order to promote sustainable resource use, especially in foreign countries where it is impossible to rely on direct enforcement of process standards. Based on the concept of 'Self-Enforcing Contracts' a model is developed simulating the simultaneous market equilibrium for certified natural resource units and physically identical units produced without observing certain environmental standards. The model along with some empirical evidence from tropical forestry yields that very likely certification will fall short in ensuring sustainable resource use. Basic natural resource management has to be primarily steered by governments and administrations, not by market forces. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Renewable resources and conservation; Demand and supply; Resource /Energy Economics and Policy; Q21; B52; D62; K42; L14. |
| Ano: 2005 |
URL: http://purl.umn.edu/24563 |
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| Kristofersson, Dadi; Rickertsen, Kyrre. |
| Fishers in quota-regulated fisheries find it to their advantage to discard less valuable fish at sea to increase the value of their catch. A theoretical model describing the high-grading behavior of fishers is presented, and an empirical model is derived as well as a testing strategy to test for high-grading and to estimate the discarded amount of each grade. The model is applied to data for the Icelandic quota regulated cod fishery during the period September 1998 to June 2001. The results indicate that highgrading occurs in the Icelandic cod fishery for both long-line and net vessels. However, the discard rates are small, and the results clearly suggest that the ban on discards in Iceland has effectively dealt with high-grading. The estimated discard... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: ITQ's; Highgrading; Empirical estimation; Resource /Energy Economics and Policy; Q21; Q22; C12. |
| Ano: 2005 |
URL: http://purl.umn.edu/24722 |
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| Kim, C.S.; Schaible, Glenn D.; Daberkow, Stan G.. |
| Rapidly declining gasoline prices from their record high during the summer of 2008, while ethanol prices remained relatively high, made it difficult for many bio-fuel policy modelers to fully explain the impacts of U.S. bio-fuel policies on fuel prices. Using profit-maximization models for blenders, refiners, and distillers, we conduct a comparative static analysis to measure the relative magnitudes of the impacts of tax credits and blending mandates on fuel-energy market equilibrium prices. Our results indicate that first, the prices of all fuels including conventional gasoline, ethanol, and blended gasoline decline as the biofuel tax credit increases, but they increase as the rate of the blending mandate increases. Second, the shadow value of a blending... |
| Tipo: Journal Article |
Palavras-chave: Bio-fuel tax credits; Blended gasoline; Blender’s market power; Mandated blending; Tariff; Agribusiness; Marketing; Political Economy; Resource /Energy Economics and Policy; Q11; Q21; Q42; Q48. |
| Ano: 2010 |
URL: http://purl.umn.edu/57157 |
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| Sedjo, Roger A.; Sohngen, Brent. |
| Forestry has been considered to have potential in reducing the atmospheric concentration of carbon dioxide by sequestrating carbon in above-ground timber and below-ground roots and soil. This potential has been noted in the Kyoto Protocol, which identified specific forestry activities for which carbon sequestration credits could be obtained. To date, a few forestry efforts have been undertaken for carbon purposes, but most of these efforts have been on a small scale. Proposals have been under discussion, however, that would result in the creation of very large areas of new forest for the purpose of offsetting some of the additional carbon that is being released into the atmosphere. Concerns are expressed, however, that large-scale sequestration operations... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Carbon; Forests; Sequestration; Leakages; Timber markets; Prices; Models; Resource /Energy Economics and Policy; Q10; Q15; Q21; Q23; Q24. |
| Ano: 2000 |
URL: http://purl.umn.edu/10778 |
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| Snyder, Lori D.; Stavins, Robert N.; Wagner, Alexander F.. |
| We develop and apply a new method for estimating the economic benefits of an environmental amenity. The method fits within the household production framework (Becker 1965), and is based upon the notion of estimating the derived demand for a privately traded option to utilize a freely-available public good. In particular, the demand for state fishing licenses is used to infer the benefits of recreational fishing. Using panel data on state fishing license sales and prices for the continental United States over a fifteen-year period, combined with data on substitute prices and demographic variables, a license demand function is estimated with instrumental variable procedures to allow for the potential endogeneity of administered prices. The econometric... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Environmental Economics and Policy; Q26; Q21; Q22; H41. |
| Ano: 2003 |
URL: http://purl.umn.edu/10908 |
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| Sedjo, Roger A.; Sohngen, Brent; Mendelsohn, Robert. |
| This study develops cumulative carbon 'supply curves' for global forests utilizing an dynamic timber supply model for sequestration of forest carbon. Because the period of concern is the next century, and particular time points within that century, the curves are not traditional Marshallian supply curves or steady-state supply curves. Rather, the focus is on cumulative carbon cost curves (quasi-supply curves) at various points in time over the next 100 years. The research estimates a number of long-term, cumulative, carbon quasi-supply curves under different price scenarios and for different time periods. The curves trace out the relationship between an intertemporal price path for carbon, as given by carbon shadow prices, and the cumulative carbon... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Carbon supply curves; Sequestration; Timber; Forests; Model; Global warming; Prices; Markets; Resource /Energy Economics and Policy; Q10; Q15; Q21; Q23; Q24. |
| Ano: 2001 |
URL: http://purl.umn.edu/10663 |
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| Isoard, Stephane; Witzke, Heinz Peter. |
| This paper reports the results of a European agricultural outlook exercise that updates former studies in three ways, i.e. in terms of timeframes, spatial coverage and policy context. This updated European agricultural outlook constitutes a key component of the forthcoming 'State of the Environment and Outlook report' of the European Environment Agency (EEA). Both activity variables and environmental indicators are reported for a baseline projection and alternative scenarios. The main findings include the following: European harvested land is expected to continue to be primarily used to fodder activities and production of cereals (80% of total area); yields increase is projected to be the main source of production growth in Europe over the next 20... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural outlook; European agricultural policy; Environment; Agribusiness; C61; Q18; Q21. |
| Ano: 2005 |
URL: http://purl.umn.edu/24500 |
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| Burger, Kees. |
| Following the example of Tiffen et al. on Machakos, Kenya, new macro-based evidence was collected in Machakos, the neighbouring Kitui district and in Benin, Cameroon and the Philippines, to assess the factors à la Boserup, inducing transitions towards sustainable land management, such as terracing, stone bands etc. We find that relative scarcity of land can be seen to induce technical changes, in the sense of Hayami & Ruttan, that correspond to the new relative scarcity, making higher man-land ratios the optimal choice. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Soil and water conservation; Sustainable agriculture; Induced innovation; Boserup; Malthus; Land Economics/Use; Q12; Q21; Q28. |
| Ano: 2005 |
URL: http://purl.umn.edu/24517 |
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| Sedjo, Roger A.; Toman, Michael. |
| An RFF Workshop brought together experts from around the world to assess the feasibility of using biological sinks to sequester carbon as part of a global atmospheric mitigation effort. The chapters of this proceeding are a result of that effort. Although the intent of the workshop was not to generate a consensus, a number of studies suggest that sinks could be a relatively inexpensive and effective carbon management tool. The chapters cover a variety of aspects and topics related to the monitoring and measurement of carbon in biological systems. They tend to support the view the carbon sequestration using biological systems is technically feasible with relatively good precision and at relatively low cost. Thus carbon sinks can be operational. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Carbon; Sinks; Global warming; Sequestration; Forests; Environmental Economics and Policy; Q10; Q15; Q21; Q23; Q24. |
| Ano: 2001 |
URL: http://purl.umn.edu/10480 |
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| Fais, Andrea; Nino, Pasquale; Giampaolo, Antonio. |
| The authors, inside a TAPAS action, have developed a methodology - based on the integration between FADN data with statistical, administrative and cartographic information - to improve the production of statistical data related to agricultural policies impact on land and environment. This methodology allows - using Geographic Information System (GIS) technology - to produce and organise data at geographical level. Data spatially referenced respond to the specific needs of agri-environmental analysis and problems, mostly related to specific areas (environmental vulnerability areas), inside defined boundaries (e.g. river basin). The GIS is implemented with several cartographic layers (Topographic and cadastral maps, land use, soils, water sources, climate,... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural statistics; Agri-environment; FADN; GIS; TAPAS; DPSIR; Environmental Economics and Policy; C81; O13; Q21. |
| Ano: 2005 |
URL: http://purl.umn.edu/24547 |
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| Registros recuperados: 60 | |
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