文章基本信息

标题：The Economic Returns to U.S. Public Agricultural Research
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作者：Alston, Julian M. ; Andersen, Matthew A. ; James, Jennifer S. 等
期刊名称：Journal of Agribusiness
印刷版ISSN：0738-8950
出版年度：2011
出版社：Journal of Agribusiness
摘要：We use newly constructed state-specific data to explore the implications of common modeling choices for measures of research returns. Our results indicate that state-to-state spillover effects are important, that the R&D lag is longer than many studies have allowed, and that misspecification can give rise to significant biases. Across states, the average of the own-state benefit-cost ratios is 21:1; or 32:1 when the spillover benefits to other states are included. These ratios correspond to real internal rates of return of 9 or 10 percent per annum, much smaller than those typically reported in the literature, partly because we have corrected for a methodological flaw in computing rates of return.
关键词：Spatial technology spillovers;knowledge stocks;R&D lags;public agricultural R&D;U.S. states