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	Provedor de dados AgEcon (9) Autor Duffield, James A. (9) Wetzstein, Michael E. (4) Shapouri, Hosein (3) Graboski, Michael S. (2) Tareen, Irfan Y. (2) Vedenov, Dmitry V. (2) Collins, Keith J. (1) Goldsmith, Peter D. (1) McCormick, Robert (1) Wang, Michael Q. (1) Wilson, Richard (1) Mais... Palavra-chave Resource /Energy Economics and Policy (8) Ethanol (3) Alternative fuels (2) Corn production (2) Net energy balance (2) Animal fats (1) Biodiesel (1) Biodiesel blends (1) Crop Production/Industries (1) Decision making under uncertainty (1) Diesel engines (1) Energy (1) Energy security (1) Fatty acid esters (1) Oil crops (1) Option pricing (1) Plant genetics (1) Price volatility (1) Production (1) Q3 (1) Mais... Tipo do documento Journal Article (4) Report (3) Conference Paper or Presentation (2) Ano 2006 (2) 2005 (2) 2002 (1) 2000 (1) 1999 (1) 1998 (1) 1995 (1) Mais... País United States (9) Idioma Inglês (9)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 9 Primeira ... 1 ... Última BIODIESEL AS A SUBSTITUTE FOR PETROLEUM DIESEL IN A STOCHASTIC ENVIRONMENT AgEcon Tareen, Irfan Y.; Wetzstein, Michael E.; Duffield, James A.. The objective of the research presented in this paper is the development of a stochastic adoption threshold. The option pricing approach for modeling investment under uncertainty is extended for the case of comparing two stochastic input prices associated with inputs that are perfect substitutes in a production process. Based on this methodology, a threshold decision rule influenced by the drift and volatility of these two input prices is developed. Theoretical results established an empirical link for measuring the tradeoff of a relatively more expensive input (biodiesel) with lower price drift and volatility compared with a lower but more volatile priced input (petroleum diesel). Tipo: Journal Article Palavras-chave: Option pricing; Production; Renewable fuels; Technology adoption under uncertainty; Resource /Energy Economics and Policy. Ano: 2000 URL: http://purl.umn.edu/15505 BIODIESEL AS A SUBSTITUTE FOR PETROLEUM DIESEL IN A STOCHASTIC ENVIRONMENT AgEcon Tareen, Irfan Y.; Duffield, James A.; Wetzstein, Michael E.. Policy makers should consider price volatility effects when determining appropriate spending levels for alternative fuel programs. Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy. Ano: 1999 URL: http://purl.umn.edu/21675 Entry of Alternative Fuels in a Volatile U.S. Gasoline Market AgEcon Vedenov, Dmitry V.; Duffield, James A.; Wetzstein, Michael E.. The hypothesis underlying this analysis is that in the presence of volatile gasoline prices competitive market forces will yield alternative, less volatile fuels as substitutes. A real-option pricing approach was employed for this analysis by modeling investment under uncertainty for the case of comparing stochastic prices of substitute commodities. Based on real options, threshold decision rules were developed for the adoption of portfolio fuels such as ethanol and conventional gasoline blends. Considering this portfolio effect, the benefit-to-cost ratios are above four for the alternative blends under varying discount rates and time horizons. This provides a strong indication that consumer demand exists for these portfolio fuels. Competitive markets will... Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy. Ano: 2005 URL: http://purl.umn.edu/19182 Entry of Alternative Fuels in a Volatile U.S. Gasoline Market AgEcon Vedenov, Dmitry V.; Duffield, James A.; Wetzstein, Michael E.. Dramatic increases in levels and volatility of gasoline prices observed in recent years may create market incentives for adoption of alternative fuels characterized by lower price volatility. This hypothesis is investigated by applying the real-options pricing approach to develop optimal thresholds for switching from conventional gasoline to alternative fuels such as ethanol blends. The main result of the paper is that given the historical price patterns of conventional gasoline and ethanol, switching to ethanol blends is an economically sound decision provided this does not decrease efficiency of the vehicle. Analysis of data subsamples during the periods of higher volatility of gasoline prices (Gulf War and War on Terrorism) provides even stronger... Tipo: Journal Article Palavras-chave: Alternative fuels; Decision making under uncertainty; Ethanol; Price volatility; Real options; Resource /Energy Economics and Policy. Ano: 2006 URL: http://purl.umn.edu/10144 Evolution of Renewable Energy Policy AgEcon Duffield, James A.; Collins, Keith J.. Tipo: Journal Article Palavras-chave: Resource /Energy Economics and Policy; Q3. Ano: 2006 URL: http://purl.umn.edu/94426 Estimating the Net Energy Balance of Corn Ethanol AgEcon Shapouri, Hosein; Duffield, James A.; Graboski, Michael S.. Studies conducted since the late 1970's have estimated the net energy value of corn ethanol. However, variations in data and assumptions used among the studies have resulted in a wide range of estimates. This study identifies the factors causing this wide variation and develops a more consistent estimate. We conclude that the net energy value of corn ethanol has become positive in recent years due to technological advances in ethanol conversion and increased efficiency in farm production. We show that corn ethanol is energy efficient as indicated by an energy ratio of 1.24. Tipo: Report Palavras-chave: Ethanol; Net energy balance; Corn production; Energy security; Resource /Energy Economics and Policy. Ano: 1995 URL: http://purl.umn.edu/34005 The Energy Balance of Corn Ethanol: An Update AgEcon Shapouri, Hosein; Duffield, James A.; Wang, Michael Q.. Studies conducted since the late 1970s have estimated the net energy value (NEV) of corn ethanol. However, variations in data and assumptions used among the studies have resulted in a wide range of estimates. This study identifies the factors causing this wide variation and develops a more consistent estimate. We conclude that the NEV of corn ethanol has been rising over time due to technological advances in ethanol conversion and increased efficiency in farm production. We show that corn ethanol is energy efficient as indicated by an energy output:input ratio of 1.34. Tipo: Report Palavras-chave: Ethanol; Net energy balance; Corn production; Energy; Crop Production/Industries; Resource /Energy Economics and Policy. Ano: 2002 URL: http://purl.umn.edu/34075 U.S. Biodiesel Development: New Markets for Conventional and Genetically Modified Agricultural Products AgEcon Duffield, James A.; Shapouri, Hosein; Graboski, Michael S.; McCormick, Robert; Wilson, Richard. With environmental and energy source concerns on the rise, using agricultural fats and oils as fuel in diesel engines has captured increasing attention. Substituting petroleum diesel with biodiesel may reduce air emissions, increase the domestic supply of fuel, and create new markets for farmers. U.S. agricultural fats and oils could support a large amount of biodiesel, but high production costs and competing uses for biodiesel feedstocks will likely prevent mass adoption of biodiesel fuel. Higher-priced niche markets could develop for biodiesels as a result of environmental regulations. Biodiesel has many environmental advantages relative to petroleum diesel, such as lower CO, CO2, SOx, and particulate matter emissions. Enhancing fuel properties by... Tipo: Report Palavras-chave: Biodiesel; Biodiesel blends; Fatty acid esters; Soybean; Oil crops; Animal fats; Plant genetics; Diesel engines; Alternative fuels; Resource /Energy Economics and Policy. Ano: 1998 URL: http://purl.umn.edu/34029 End Materials AgEcon Duffield, James A.; Goldsmith, Peter D.. Includes: Coming Attractions Tipo: Journal Article Palavras-chave: Teaching/Communication/Extension/Profession. Ano: 2005 URL: http://purl.umn.edu/93615 Registros recuperados: 9 Primeira ... 1 ... Última

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