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| Van Dusen, M. Eric. |
| This dissertation focuses on the theoretical modeling and empirical testing of household motivations for the in situ conservation of crop genetic resources (CGR). An original household survey is used to test whether the household diversity outcomes are different for the cropping system as a whole, for the principal crop, maize, or for the secondary crops, beans and squash. Agro-ecological characteristics and market characteristics are found to significantly affect the levels of diversity maintained by households. A review of the economic literature relevant to modeling in situ conservation is presented. A theoretical model is developed in which a household's decision to plant a milpa variety is linked to household, agro-ecological, and market... |
| Tipo: Thesis or Dissertation |
Palavras-chave: Crop Production/Industries; Resource /Energy Economics and Policy. |
| Ano: 2000 |
URL: http://purl.umn.edu/11941 |
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| Van Dusen, M. Eric. |
| The purpose of this paper is to model farmer behavior with respect to in situ conservation, extending the existing literature beyond competition within the principal crop to encompass a broader definition of on-farm diversity and testing the hypothesis that factors affecting the principal crop explain overall crop diversity on the farm . Primary survey data is used from a rural area of Puebla state, Mexico. A Poisson regression is run on the total number of species in the milpa system as explained by cultural, agricultural and economic variables. A set of Poisson regressions, one for each crop group, is run in order test whether factors affect different crops in different ways. Policy implication of the findings are discussed for an in situ conservation... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2000 |
URL: http://purl.umn.edu/21889 |
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| Gauchan, Devendra; Van Dusen, M. Eric; Smale, Melinda. |
| This paper presents an empirical case study about farmer management of rice genetic resources in two communities of Nepal, drawing on interdisciplinary, participatory research that involved farmers, rice geneticists, and social scientists. The decision-making process of farm households is modelled and estimated in order to provide information for the design of community-based conservation programs. A bivariate model with sample selection treats the simultaneous process of whether farmers decide to plant landraces or modern varieties, and whether the landraces they choose to plant constitute genetic diversity of interest for future crop improvement. Findings show that the two landrace choices are affected by different social and economic factors. The... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Genetic resources; Rice; Farmers; Nepal; Landraces; Crop diversity; Crop Production/Industries. |
| Ano: 2005 |
URL: http://purl.umn.edu/58589 |
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| Van Dusen, M. Eric; Gauchan, Devendra; Smale, Melinda. |
| This paper presents an empirical case study about farmer management of rice genetic resources in two communities of Nepal, drawing on interdisciplinary, participatory research that involved farmers, plant breeders, and social scientists. The decision-making process of farm households is modeled and estimated in order to provide information for the design of community-based conservation programs. A bivariate model with sample selection treats the simultaneous process of whether farmers decide to plant landraces or modern varieties, and whether the landraces they choose to plant constitute genetic diversity of interest for future crop improvement. Findings show that the two landrace choices are affected by different social and economic factors, indicating... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Management. |
| Ano: 2005 |
URL: http://purl.umn.edu/19210 |
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| Pardey, Philip G.; Koo, Bonwoo; Wright, Brian D.; Van Dusen, M. Eric; Skovmand, Bent; Taba, Suketoshi. |
| Worldwide, the number of genebanks and the amount of seed stored in them has increased substantially over the past few decades. Most attention is focused on the likely benefits from conservation, but conserving germplasm involves costs whose nature and magnitude are largely unknown. Because more resources spent on conserving germplasm often means less spent on characterizing the collection or using the saved seeds in crop-improvement research, knowledge of the costs of germplasm conservation has important, possibly long run, R&D management, policy, and food-security consequences. Moreover, these costs place a lower bound on the benefits deemed likely to justify the expense of saving this seed. In this paper we compile and use a set of cost data for... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Germplasm conservation; Gene banks; Plant; Maize -- Breeding; Wheat -- Breeding; Rate of return; Resource /Energy Economics and Policy. |
| Ano: 1999 |
URL: http://purl.umn.edu/97509 |
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