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| Registros recuperados: 25 | |
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| Elias, Carlos G.; Alwang, Jeffrey Roger. |
| This paper presents an economic model of group formation with an application to data collected from an agricultural credit program in western Honduras. We formulate a simple theory of group formation using the concept of centers of gravity to explain why individuals join a group. According to our theory, prospective members join based on the potential benefits and costs of group membership, and based on their perception of social distance between themselves and other group members. Social distance is unobservable by outsiders but known by the individual: if you are in then you know who has blue hair. Thus, we argue that social distance helps explain preferences for group formation. To test our theory we analyze data collected from members and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural Finance; Institutional and Behavioral Economics. |
| Ano: 2008 |
URL: http://purl.umn.edu/6527 |
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| Rudi, Nderim; Norton, George W.; Alwang, Jeffrey Roger; Asumugha, Godwin N.. |
| Marker-assisted breeding could have a major impact in relieving productivity constraints that cannot as easily or rapidly be relieved by conventional breeding alone. This paper estimates the benefits of using marker-assisted breeding, as compared to conventional breeding alone, in developing cassava varieties resistant to cassava mosaic disease, green mite, whitefly and post-harvest physiological deterioration in Nigeria, Ghana and Uganda. Marker-assisted breeding is estimated to save at least four years in the breeding cycle for varieties resistant to the pests and to result in incremental net benefits over 25 years in the range of $34 to $800 million depending on the country, the particular constraint and various assumptions. Benefits may reach as high... |
| Tipo: Journal Article |
Palavras-chave: Marker-assisted breeding; Impact assessment; Cassava; Green mite; Whitefly; Cassava mosaic disease; Post-harvest physiological deterioration; Crop Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/93862 |
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| Ersado, Lire; Amacher, Gregory S.; Alwang, Jeffrey Roger. |
| The adoption of more efficient farming practices and technologies that enhance agricultural productivity and improve environmental sustainability is instrumental for achieving economic growth, food security and poverty alleviation in sub-Saharan Africa. Our research examines the interaction between public investments, community health, and adoption of productivity and land enhancing technologies by households in the northern Ethiopian state of Tigray. Agricultural technology adoption decisions are modeled as a sequential process where the timing of choices can matter. We find that time spent sick and opportunity costs of caring for sick family members are significant factors in adoption. Sickness, through its impact on household income and labor allocation... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Land Economics/Use. |
| Ano: 2003 |
URL: http://purl.umn.edu/16047 |
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| McGuirk, Anya M.; Driscoll, Paul J.; Alwang, Jeffrey Roger; Huang, Huilin. |
| A misspecification testing strategy designed to ensure that the statistical assumptions underlying a system of equations are appropriate is outlined. The system tests take into account information in, and interactions between, all equations in the system and can be used in a wide variety of applications where systems of equations are estimated. The system testing approach is demonstrated by modeling U.S. consumer demand for meats. The example illustrates how the approach can be used to disentangle issues regarding structural change and other forms of model misspecification. |
| Tipo: Journal Article |
Palavras-chave: Demand and Price Analysis. |
| Ano: 1995 |
URL: http://purl.umn.edu/30938 |
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| Ersado, Lire; Amacher, Gregory S.; Alwang, Jeffrey Roger. |
| The adoption of more efficient farming practices and technologies that enhance agricultural productivity and improve environmental sustainability is instrumental for achieving economic growth, food security and poverty alleviation in sub-Saharan Africa. Our research examines the interaction between public investments, community health, and adoption of productivity and land enhancing technologies by households in the northern Ethiopian state of Tigray. Agricultural technology adoption decisions are modeled as a sequential process where the timing of choices can matter. We find that time spent sick and opportunity costs of caring for sick family members are significant factors in adoption. Sickness, through its impact on household income and labor... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Productivity Analysis; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2003 |
URL: http://purl.umn.edu/22223 |
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| Alwang, Jeffrey Roger; Jansen, Hans G.P.. |
| This paper uses an asset-base framework to analyze the determinants of rural growth and poverty reduction for the three poorest countries in Central America: Guatemala, Honduras and Nicaragua. High inequalities in the distribution of productive assets in all three countries constrain how the poor share in the benefits of growth, even under appropriate policy regimes. Heterogeneous conditions require complementary analysis of spatial determinants of well-being, analysis of household-level assets, and how household livelihood strategies, conditioned on spatial attributes and asset bases, determine well-being outcomes. Using a combination of GIS mapping techniques and quantitative household analysis, we generate a description of rural territories that... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Community/Rural/Urban Development. |
| Ano: 2006 |
URL: http://purl.umn.edu/25777 |
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| Barrera, Victor; Norton, George W.; Alwang, Jeffrey Roger; Mauceri, Maria. |
| Agricultural development is essential for improved well-being in rural Ecuador. As much as 40% of the population relies on agriculture as its primary source of income and agricultural exports account for a significant proportion of foreign exchange revenue. In the highlands, potatoes are a major staple, and more than 90,000 producers grow them on about 60,000 hectares of land. Potato production is associated with heavy use of chemical inputs--pesticides and fertilizers--to manage pests and optimize profits. Concerns have emerged about the sustainability of Ecuador's potato crop as rising input costs have created a cost squeeze and public health officials are increasingly concerned about health consequences of pesticide over use. Producers need... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management. |
| Ano: 2005 |
URL: http://purl.umn.edu/19400 |
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| Buck, Steven; Alwang, Jeffrey Roger. |
| Ecuadorian farmers do not play the investment game (Berg, Dickhaut and McCabe 1995) the same with community farmers as they do with agricultural technicians. Women exhibit a preference for trust in agricultural technicians (vertical trust). Using experimental and survey data from 191 farmers we examine factors associated with 1) farmer trust in community members, 2) farmer trust in agricultural technicians, and 3) differences between levels of trust in agricultural technicians and community farmers. Then we explore how our measures of trust correlate with pesticide knowledge. Farmers who place more trust in community farmers score lower on our pesticide knowledge exam. We find that farmers who exhibit a preference for trusting agricultural technicians... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management. |
| Ano: 2006 |
URL: http://purl.umn.edu/21139 |
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| Norton, George W.; Alwang, Jeffrey Roger. |
| This paper suggests practical methods for assessing policy research programs, both ex post and ex ante. Measuring the benefits of policy research is difficult: the path of causation between research and policy change is nearly always uncertain; multiple factors influence any particular policy change; policies are diverse in nature as are their intended and actual effects; and some effects of policy research are not priced in the market. Many of the benefits of changes in policy stem from the reduced cost of welfare-improving institutional change. Economic surplus analysis can be used to assess such changes. In some cases, Bayesian decision theory may be helpful in evaluating policy research, although it is usually difficult to obtain estimates of the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 1998 |
URL: http://purl.umn.edu/48289 |
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| Ersado, Lire; Amacher, Gregory S.; Alwang, Jeffrey Roger. |
| The adoption of more efficient farming practices and technologies that enhance agricultural productivity and improve environmental sustainability is instrumental for achieving economic growth, food security and poverty alleviation in sub-Saharan Africa. Our research examines the interaction between public investments, community health, and adoption of productivity and land enhancing technologies by households in the northern Ethiopian state of Tigray. Agricultural technology adoption decisions are modeled as a sequential process where the timing of choices can matter. We find that time spent sick and opportunity costs of caring for sick family members are significant factors in adoption. Sickness, through its impact on household income and labor... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2003 |
URL: http://purl.umn.edu/25908 |
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| Mauceri, Maria; Alwang, Jeffrey Roger; Norton, George W.; Barrera, Victor. |
| Potato farmers in Ecuador rely on chemical inputs to manage pests and optimize yields. Integrated pest management techniques lower production costs, reduce pesticide exposure, and improve long-term agricultural sustainability. Public extension does not, however, exist in Ecuador and cost-effective means of communicating complex messages to producers are needed. We analyze cost-effectiveness of alternative dissemination methods, including farmer field schools (FFS), field days, pamphlets, and word-of-mouth transmission. Field days and pamphlets have strong impacts on adoption, especially considering their low costs. FFS are effective, but expensive. Evidence also indicates significant diffusion from FFS to non-FFS farmers, indicating high... |
| Tipo: Journal Article |
Palavras-chave: Ecuador; Farmer field schools; Integrated pest management; Technology adoption; Technology dissemination; Q01; Q16. |
| Ano: 2007 |
URL: http://purl.umn.edu/37091 |
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| Registros recuperados: 25 | |
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