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The Search for R&D Spillovers

Zvi Griliches
The Scandinavian Journal of Economics
Vol. 94, Supplement. Proceedings of a Symposium on Productivity Concepts and Measurement Problems: Welfare, Quality and Productivity in the Service Industries (1992), pp. S29-S47
Published by: Wiley on behalf of The Scandinavian Journal of Economics
DOI: 10.2307/3440244
Stable URL: http://www.jstor.org/stable/3440244
Page Count: 19
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The Search for R&D; Spillovers
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Abstract

R&D spillovers are, potentially, a major source of endogenous growth in various recent "New Growth Theory" models. This paper reviews the basic model of R&D spillovers and then focuses on the empirical evidence for their existence and magnitude. It surveys the older empirical literature with special attention to the econometric difficulties of actually coming up with convincing evidence on this topic. Taken individually, many of the studies are flawed and subject to a variety of reservations, but the overall impression remains that R&D spillovers are both prevalent and important.

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