Research returns redux: a meta-analysis of the returns to agricultural R&D
A total of 294 studies of returns to agricultural R&D (including extension) were compiled and these studies provide 1,858 separate estimates of rates of return. This includes some extreme values, which are implausible. When the highest and lowest 2.5 percent of the rates of return were set aside, th...
| Autores principales: | , , , |
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| Formato: | Artículo preliminar |
| Lenguaje: | Inglés |
| Publicado: |
International Food Policy Research Institute
1998
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/161247 |
| _version_ | 1855532159135121408 |
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| author | Alston, Julian M. Marra, Michele C. Pardey, Philip G. Wyatt, T. J. |
| author_browse | Alston, Julian M. Marra, Michele C. Pardey, Philip G. Wyatt, T. J. |
| author_facet | Alston, Julian M. Marra, Michele C. Pardey, Philip G. Wyatt, T. J. |
| author_sort | Alston, Julian M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A total of 294 studies of returns to agricultural R&D (including extension) were compiled and these studies provide 1,858 separate estimates of rates of return. This includes some extreme values, which are implausible. When the highest and lowest 2.5 percent of the rates of return were set aside, the estimated annual rates of return averaged 73 percent overall–88 percent for research only, 45 percent for research and extension, and 79 percent for extension only. But these averages reveal little meaningful information from a large and diverse body of literature, which provides rate-of-return estimates that are often not directly comparable. The purpose of this study was to go behind the averages, and try to account for the sources of differences, in a meta-analysis of the studies of returns to agricultural R&D. The results conform with the theory and prior beliefs in many ways. Several features of the methods used by research evaluators matter, in particular assumptions about lag lengths and the nature of the research-induced supply shift. |
| format | Artículo preliminar |
| id | CGSpace161247 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1998 |
| publishDateRange | 1998 |
| publishDateSort | 1998 |
| publisher | International Food Policy Research Institute |
| publisherStr | International Food Policy Research Institute |
| record_format | dspace |
| spelling | CGSpace1612472025-11-06T06:56:09Z Research returns redux: a meta-analysis of the returns to agricultural R&D Alston, Julian M. Marra, Michele C. Pardey, Philip G. Wyatt, T. J. agricultural research A total of 294 studies of returns to agricultural R&D (including extension) were compiled and these studies provide 1,858 separate estimates of rates of return. This includes some extreme values, which are implausible. When the highest and lowest 2.5 percent of the rates of return were set aside, the estimated annual rates of return averaged 73 percent overall–88 percent for research only, 45 percent for research and extension, and 79 percent for extension only. But these averages reveal little meaningful information from a large and diverse body of literature, which provides rate-of-return estimates that are often not directly comparable. The purpose of this study was to go behind the averages, and try to account for the sources of differences, in a meta-analysis of the studies of returns to agricultural R&D. The results conform with the theory and prior beliefs in many ways. Several features of the methods used by research evaluators matter, in particular assumptions about lag lengths and the nature of the research-induced supply shift. 1998 2024-11-21T09:54:25Z 2024-11-21T09:54:25Z Working Paper https://hdl.handle.net/10568/161247 en Open Access application/pdf International Food Policy Research Institute Alston, Julian M.; Marra, Michele C.; Pardey, Philip G.; Wyatt, T. J. 1998. Research returns redux;a meta-analysis of the returns to agricultural R&D. EPTD Discussion Paper 38. https://hdl.handle.net/10568/161247 |
| spellingShingle | agricultural research Alston, Julian M. Marra, Michele C. Pardey, Philip G. Wyatt, T. J. Research returns redux: a meta-analysis of the returns to agricultural R&D |
| title | Research returns redux: a meta-analysis of the returns to agricultural R&D |
| title_full | Research returns redux: a meta-analysis of the returns to agricultural R&D |
| title_fullStr | Research returns redux: a meta-analysis of the returns to agricultural R&D |
| title_full_unstemmed | Research returns redux: a meta-analysis of the returns to agricultural R&D |
| title_short | Research returns redux: a meta-analysis of the returns to agricultural R&D |
| title_sort | research returns redux a meta analysis of the returns to agricultural r d |
| topic | agricultural research |
| url | https://hdl.handle.net/10568/161247 |
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