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| Registros recuperados: 2.283 | |
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| Kinwa-Muzinga, Annie; Mazzocco, Michael A.. |
| Biotechnology techniques have played an important role in meeting farmer's needs in the seed industry given the changes in customer's preferences. This paper analytically evaluates the time paths of pricing a portfolio of seeds, which simultaneously encourages seed adoption and maximizes a firm's returns within a competitive environment while considering shorter product life cycles. Using a dynamic programming (DP) approach, the results indicate that the single pricing model and the portfolio pricing model are materially affected by the firm's initial market share, the farmer's attitude towards seed attributes, and the firm competitiveness within the industry. Farmer's acceptance of a seed variety will have an impact on seed price or actions from the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Financial Economics; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2002 |
URL: http://purl.umn.edu/19829 |
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| Pardey, Philip G.; Alston, Julian M.; Chan-Kang, Connie; Magalhaes, Eduardo Castelo; Vosti, Stephen A.. |
| In general, reported rates of return to agricultural R&D are high, but questions have been raised about upward biases in the evidence. Among the reasons for this bias, insufficient attention to attribution aspects-matching of research benefits and costs-is a pervasive problem, the magnitude of which is illustrated here with new evidence for Brazil. Over the period 1981 to 2003, varietal improvements in upland rice, edible beans, and soybeans yielded benefits attributable to research of $14.8 billion in present value (1999 prices) terms; 6.1 percent of the corresponding value of crop output. If all of those benefits were attributed to Embrapa, a public research corporation accounting for more than half Brazil's agricultural R&D spending, the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Brazil; Agricultural R&D; Attribution; Soybeans; Rice; Beans; Benefit-cost ratios; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2002 |
URL: http://purl.umn.edu/14422 |
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| Demont, Matty; Tollens, Eric. |
| In literature, impact estimates of agricultural biotechnology vary strongly according to the region, the crop, the year, the scale, and the methodology of the study. Therefore, this paper provides a methodological background for analysing, interpreting, and comparing these estimates. All possible uncertainties entailed in the estimation procedure are reviewed as well as a methodology to incorporate them into a stochastic simulation model. This procedure can be used to assess the welfare effects of agricultural biotechnology in the European Union. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2001 |
URL: http://purl.umn.edu/31828 |
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| White, Fred C.. |
| When there is a correspondence between two logical systems, duality can be used to derive a correspondence between results in one system and results in another system (Russell and Wilkinson, 1978). Under appropriate regularity conditions, dual functions such as normalized profit functions in production economics embody the same information on technology as the more familiar primal production functions. The technology can be examined directly using the primal approach or indirectly using the dual approach. It is often easier to estimate product supply and input demand relationships using a dual approach, because only endogenous variables appear on the left-hand side of equations and only exogenous variables appear on the right-hand side of equations... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 1987 |
URL: http://purl.umn.edu/50023 |
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| Heisey, Paul W.; Morris, Michael L.. |
| Interest in the economics of plant breeding first emerged during the late 1960s and early 1970s following the well-known green revolutions in wheat and rice. Since that time, few branches of agricultural research have been subjected to as much scrutiny as plant breeding. Impacts assessment studies consistently conclude that the economic benefits generated by successful plant breeding programs are large, positive, and widely distributed. Case studies repeatedly find that investment in crop genetic improvement generates attractive rates of return compared to alternative investment opportunities. Similarly, case studies consistently show that the welfare benefits resulting from the adoption of modern varieties (MVs) are broadly shared by producers and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2002 |
URL: http://purl.umn.edu/19828 |
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| Alston, Julian M.; Marra, Michele C.; Pardey, Philip G.; Wyatt, T.J.. |
| A total of 289 studies of returns to agricultural R&D were compiled and these provide 1821 estimates of rates of return. After removing statistical outliers and incomplete observations, across the remaining 1128 observations the estimated annual rates of return averaged 65 per cent overall — 80 per cent for research only, 80 per cent for extension only, and 47 per cent for research and extension combined. These averages reveal little meaningful information from a large body of literature, which provides rate‐of‐return estimates that are often not directly comparable. This study was aimed at trying to account for the differences. Several features of the methods used by research evaluators matter, in particular assumptions about lag lengths and the... |
| Tipo: Journal Article |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2000 |
URL: http://purl.umn.edu/117834 |
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| Smucker, Glenn R.; White, Thomas A.; Bannister, Michael. |
| There has long been an active debate in Haiti—as in many other developing countries— over whether or not the customary tenure system constrains technology adoption and agricultural development, and whether cadaster and land titling should be national priorities. This paper contributes to this debate by reviewing and interpreting the body of literature and new empirical evidence concerning the relationship between land tenure and the adoption of technology in rural Haiti. The findings suggest that (a) formal title is not necessarily more secure than informal arrangements, (b) informal arrangements based on traditional social capital resources assure affordable and flexible access to land for most people, and (c) perceived stability of access to land—via... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2000 |
URL: http://purl.umn.edu/50042 |
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| Doss, Cheryl R.. |
| Drawing on a series of technology adoption studies carried out by the International Maize and Wheat Improvement Center (CIMMYT) in collaboration with national agricultural research systems in Eastern Africa during 1996-98, this paper suggests alternative approaches for designing technology adoption studies to obtain as much useful information as possible. It describes the Eastern African studies and summarizes specific lessons learned, asks what can be learned from farm-level studies in a few communities, explores generic limitations of micro studies and a range of problems and issues faced in carrying out such studies, addresses challenges that arise in trying to put together a set of compatible micro studies, and lists overall conclusions and specific... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2003 |
URL: http://purl.umn.edu/46552 |
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| Registros recuperados: 2.283 | |
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