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| Registros recuperados: 12 | |
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| Simpson, R. David. |
| There has been considerable recent interest in the valuation of ecosystem services. We focus here on the value of such services in the production of market goods. Although the conceptual basis for conducting such exercises is straightforward, the data with which to implement them empirically is generally not available. An upper bound on the value of ecosystem services arises when the production technology exhibits constant returns to scale in ecosystem services and market inputs jointly. There are compelling reasons to suppose that the existence of fixed factors of production would imply that production technologies exhibit decreasing return to scale. Under these circumstances, no general conclusions can be drawn. We show in an illustrative example that a... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Ecosystem services; Returns to scale; Elasticity of substitution; Resource /Energy Economics and Policy; Q29. |
| Ano: 2001 |
URL: http://purl.umn.edu/10832 |
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| Sedjo, Roger A.; Simpson, R. David. |
| There is considerable interest in biodiversity prospecting (the search for valuable new products from natural sources) as a conservation strategy. In an earlier paper, we have argued that the value of the marginal species (and, by extension, the incentives for the conservation of the habitat on which it is found) is small. In this paper, we show that investments in biodiversity prospecting are unlikely to increase incentives for conservation by much. If the value of the marginal species were appreciable, researchers ought already to have made investments to exploit it. If it is not, it is doubtful that additional investments will generate any substantial increase. It is important to be clear about our findings: we are not saying that none of the myriad... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Biodiversity; Biodiversity prospecting; Investment; Conservation policy; Environmental Economics and Policy; O13; Q29. |
| Ano: 1996 |
URL: http://purl.umn.edu/10821 |
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| Simpson, R. David; Craft, Amy B.. |
| Biologists and conservation advocates have expressed grave concern over perceived threats to biological diversity. "Biodiversity prospecting" -- the search among naturally occurring organisms for new products of agricultural, industrial, and, particularly, pharmaceutical value -- has been advanced as both a mechanism and a motive for conserving biological diversity. Economists and others have attempted to estimate the value of biodiversity for use in new pharmaceutical project research. Most of these existing approaches are incomplete, however, as they have not considered full social welfare, i.e., both consumer surplus and profit. This paper addresses social welfare by calibrating a model of competition between differentiated products with data from the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Biodiversity prospecting; Differentiated products; Pharmaceutical research and development; Biogeographic models; Global warming; Habitat conversion; Health Economics and Policy; D43; L13; Q29. |
| Ano: 1996 |
URL: http://purl.umn.edu/10877 |
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| Schilizzi, Steven. |
| Ethics and economics have long been viewed, if not as being incompatible, at least as being at odds with each other. This has often translated in the field of environmental policy and management into radical opposition between supporters of economic performance and environmentalists. It has seemed that the ethics of economics and that of environmental preservation were themselves at odds. The discussion has opposed utilitarian and duty-based philosophies. Ultimately, the firm manager, especially when under financial pressure, must decide between keeping the firm in business and doing the right thing for the environment. This view of things is now itself at odds with reality. One needs to explain why an increasing number of firms, both big and small, are... |
| Tipo: Presentation |
Palavras-chave: Environmental Economics and Policy; Institutional and Behavioral Economics; Z10; A12; L20; M20; Q29. |
| Ano: 2000 |
URL: http://purl.umn.edu/123729 |
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| Popp, Jennie S. Hughes; Wailes, Eric J.; Young, Kenneth B.; Smartt, Jim; Intarapapong, Walaiporn. |
| The present article uses the modified Arkansas off-stream reservoir analysis and the environmental policy-integrated climate models to examine the impacts of on-farm reservoirs and tail water recovery systems in conjunction with other best management practices on profitability, water use, and sediment control for rice-soybean farming operations. Results suggest that, under limited water availability conditions, reservoirs and tail water recovery systems can improve profitability, reduce ground water dependence, and reduce the movement of sediment, nutrients, and pesticides off-farm. Although reservoirs may not be profitable under plentiful water conditions, cost-sharing opportunities may make them a viable means of addressing environmental concerns. |
| Tipo: Journal Article |
Palavras-chave: On-farm reservoirs; Sediment control; Water management; Q25; Q15; Q29. |
| Ano: 2003 |
URL: http://purl.umn.edu/43212 |
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| Simpson, R. David; Sedjo, Roger A.. |
| We develop a model of search in which a researcher chooses the size of sequential batches of samples to test. While earlier work has considered similar questions, the contribution of this paper is to use the search model to place a value on the marginal research opportunity. The valuation of such opportunities may be of little interest or relevance in many of the contexts in which search models are employed, but we apply our analysis to an area of considerable societal interest: the valuation of biological diversity for use in new product research. While data from which to make inferences are limited, we find that, using plausible estimates of relevant parameters, the value of biodiversity in these applications is negligible. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Biodiversity; Search; Sequential; Conservation incentives; Environmental Economics and Policy; D83; Q29. |
| Ano: 1996 |
URL: http://purl.umn.edu/10618 |
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| Registros recuperados: 12 | |
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