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	Provedor de dados AgEcon (8) Autor Wang, Chenggang (8) Segarra, Eduardo (4) Reeves, Jeanne M. (2) Velandia, Margarita M. (2) Belasco, Eric J. (1) Bordovsky, James P. (1) Buccola, Steven T. (1) English, Burton C. (1) Funtanilla, Margil (1) Gastelum, Jesus R. (1) Lambert, Dayton M. (1) Larkin, Sherry L. (1) Larson, James A. (1) Lyford, Conrad P. (1) Marra, Michele C. (1) Martin, Steven W. (1) Mishra, Ashok K. (1) Mooney, Daniel F. (1) Nair, Shyam (1) Pan, Suwen (1) Mais... Palavra-chave Research and Development/Tech Change/Emerging Technologies (3) Resource /Energy Economics and Policy (3) Cotton (2) Crop Production/Industries (2) Farm Management (2) Groundwater (2) Production Economics (2) Agribusiness (1) Agricultural and Food Policy (1) Agricultural productivity (1) BLP (1) Common property resource (1) Common-pool resources (1) Crop Choice (1) Discrete Choice Model (1) Groundwater extraction (1) Groundwater management (1) Groundwater use (1) Infrastructure capital. (1) Irrigation water demand (1) Mais... Tipo do documento Conference Paper or Presentation (6) Journal Article (1) Report (1) Ano 2011 (4) 2010 (1) 2009 (2) 2006 (1) País United States (8) Idioma Inglês (8)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 8 Primeira ... 1 ... Última The Economics of Commonly Owned Groundwater When User Demand Is Perfectly Inelastic AgEcon Wang, Chenggang; Segarra, Eduardo. This paper provides a theoretical analysis of the common-pool resource dilemma in extracting nonrenewable groundwater resources when water demand is perfectly inelastic. It complements the existing theory of groundwater use, which assumes away the possibility of demand perfect inelasticity. Under perfectly inelastic water demand, the common-pool resource dilemma is by-passed if groundwater users are equally productive in water use. If they are not, a new type of inefficiency can arise due to the lack of a rationing mechanism on the basis of productivity. Our analysis suggests that groundwater management research should pay more attention to water demand elasticity and productivity heterogeneity. Tipo: Journal Article Palavras-chave: Common-pool resources; Groundwater extraction; Groundwater management; Groundwater use; Irrigation water demand; Optimal control; Pumping externality; Water demand elasticity; Resource /Energy Economics and Policy. Ano: 2011 URL: http://purl.umn.edu/105533 An Evaluation of the Organic Cotton Marketing Opportunity AgEcon Funtanilla, Margil; Lyford, Conrad P.; Wang, Chenggang. The organic cotton market has been growing internationally and presents a potential opportunity for producers. This article evaluates prices and returns for organic cotton production in Texas using a stochastic frontier approach. Organic producers were found to be more profitable relative to conventional production, but the analysis showed that organic producers were relatively less technically efficient. Tipo: Conference Paper or Presentation Palavras-chave: Organic cotton; Production frontier; Technical efficiency; Production Economics. Ano: 2009 URL: http://purl.umn.edu/49359 Estimating the Spatial Distribution of Groundwater Demand In the Texas High Plains AgEcon Zhao, Shiliang; Wang, Chenggang; Bordovsky, James P.; Sheng, Zhuping; Gastelum, Jesus R.. Developing groundwater management plans requires a good understanding of the interdependence of groundwater hydrology and producer water use behavior. While state-of-the-art groundwater models require water demand data at highly disaggregated levels, the lack of producer water use data has held up the progress to meet that need. This paper proposes an econometric framework that links county-level crop acreage data to well-level hydrologic data to produce heterogeneous patterns of crop choice and irrigation practices within a county. Together with agronomic data on irrigation water requirements of various crops and irrigation practices, this model permits estimation of the water demand distribution within a county. We apply this model to a panel of 16... Tipo: Conference Paper or Presentation Palavras-chave: Discrete Choice Model; Random-coefficients Discrete Choice Model; Crop Choice; BLP; Groundwater; Texas High Plains; Ogallala Aquifer; Crop Production/Industries; Resource /Energy Economics and Policy. Ano: 2011 URL: http://purl.umn.edu/103931 Public Investment Policy in Life-Science Research AgEcon Wang, Chenggang; Xia, Yin; Shoemaker, Robbin A.; Buccola, Steven T.. The article presents a dynamic model of research investment. This model allows us to examine three important channels through which public investment policy can affect the private sector's research investment, that is, the productivity, replacement, and wage effects. Two alternative empirical approaches are introduced to implement the model. Through a unified examination of the productivity, replacement, and wage effects, the empirical estimation of this model will provide insight into whether public-sector research investment crowds in or crowds out private-sector research investment. Tipo: Conference Paper or Presentation Palavras-chave: Research and Development/Tech Change/Emerging Technologies. Ano: 2006 URL: http://purl.umn.edu/21330 Adoption of Variability Detection and Variable Rate Application Technologies by Cotton Farmers in Southern United States AgEcon Nair, Shyam; Wang, Chenggang; Segarra, Eduardo; Belasco, Eric J.; Velandia, Margarita M.; Reeves, Jeanne M.. A nested logit model was used to analyze the 2009 Southern Cotton Precision Farming Survey to study the impact of farmer and farm characteristics on the adoption of Variability Detection Technologies (VDT) and the adoption of Variability Rate application Technology (VRT) conditioned on the type of the VDT chosen. The results showed that the farm size and exposure to extension activities are important factors affecting the choice of VDTs. The farmers adopting both soil and plant based VDTs are more likely to adopt VRT. The probability of adoption of VRTs was lower for Texas cotton farmers irrespective of the type of VDT adopted. In general, younger, more educated farmers who use computers for farming operations are more likely to adopt VRT when they... Tipo: Conference Paper or Presentation Palavras-chave: Precision Agriculture; Technology Adoption; Cotton; Crop Production/Industries; Farm Management; Research and Development/Tech Change/Emerging Technologies; O33; Q16. Ano: 2011 URL: http://purl.umn.edu/103567 Precision Farming by Cotton Producers in Twelve Southern States: Results from the 2009 Southern Cotton Precision Farming Survey AgEcon Mooney, Daniel F.; Roberts, Roland K.; English, Burton C.; Lambert, Dayton M.; Larson, James A.; Velandia, Margarita M.; Larkin, Sherry L.; Marra, Michele C.; Martin, Steven W.; Mishra, Ashok K.; Paxton, Kenneth W.; Rejesus, Roderick M.; Segarra, Eduardo; Wang, Chenggang; Reeves, Jeanne M.. Precision Farming by Cotton Producers in Twelve Southern States: Results from the 2009 Southern Cotton Precision Farming Survey Tipo: Report Palavras-chave: Cotton; Precision farming; Survey; Agribusiness; Farm Management; Production Economics; Research and Development/Tech Change/Emerging Technologies. Ano: 2010 URL: http://purl.umn.edu/91333 Optimal Groundwater Extraction under the Linear Response and Plateau Technology AgEcon Wang, Chenggang; Segarra, Eduardo. This paper studies the optimal management of groundwater resources when agronomic and hydrologic constraints bind the use of groundwater for irrigation. The binding constraints lead to a perfectly inelastic demand for groundwater. In the case of symmetric agents the social and private rates of groundwater extraction coincide with one another and commonality is completely innocuous; in the case of asymmetric agents the rate of extraction remains the same in the social and private setting, yet irrigation is abandoned by the same agent at different times. The model offers one way to rationalize the empirically found peculiarities of sticky water demand and Gisser-Sanchez Effect which defy conventional theory. The situations described in the model also... Tipo: Conference Paper or Presentation Palavras-chave: Common property resource; Groundwater; Linear response and plateau technology; The law of the minimum.; Resource /Energy Economics and Policy. Ano: 2009 URL: http://purl.umn.edu/51432 The Impact of Nonfarm Activities on Agricultural Productivity in Rural China AgEcon Wang, Ye; Wang, Chenggang; Pan, Suwen. Although evidence abounds that the development of rural non-farm activities have increased rural household income and contributed to rural development, the underlying structure and mechanism of the linkage between agricultural productivity and non-farm activities is poorly understood. Using a unique panel dataset of Chinese villages, this article examines the mechanism by which non-farm activities influence agricultural productivity. I find that Chinese villages’ non-farm revenue has a significant positive effect on agricultural land productivity. Although non-farm activities do withdraw labor out of agriculture and therefore dampen land productivity, that negative effect is negligible in comparison with the land productivity improvement brought by... Tipo: Conference Paper or Presentation Palavras-chave: Rural non-farm activities; Labor migration; Agricultural productivity; Infrastructure capital.; Agricultural and Food Policy; Productivity Analysis; O13; Q18. Ano: 2011 URL: http://purl.umn.edu/103605 Registros recuperados: 8 Primeira ... 1 ... Última

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