文章基本信息

标题：Linking technical change to research effort: an examination of aggregation and spillovers effects
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作者：Traxler, Greg ; Byerlee, Derek
期刊名称：Journal of Food Distribution Research
印刷版ISSN：0047-245X
出版年度：2001
页码：235-246
出版社：Food Distribution Research Society
摘要：We used a disaggregate approach to examine investment efficiency of wheat breeding research in India. India's total research effort comprizes 20 research programs spread across 50 experiment stations. A technology spillover matrix was constructed for both potential and actual spillovers. Spillovers and free-riding were dominant characteristics of technical change during the period studied. Although the aggregate rate of return to wheat improvement research in India was estimated to be 55%, eight programs were found to have earned a negative rate of return when spillins were taken into account. Research output is concentrated on a few strong programs. The two strongest programs generated 75% of all the technical change benefits, even though they claimed just 22% of research resources. These two programs include a significant degree of overlap, while on the other hand many farmers were not reached by any of the programs- 56 and 78% of rainfed and durum area, respectively, in 1990 was still sown with pre-1976 varieties.© 2001 Elsevier Science B.V. All rights reserved.
关键词：Technical change;Wheat;India;Spillovers