The Search for R&D Spillovers

Zvi Griliches

NBER Working Paper No. 3768 (Also Reprint No. r1758)
Issued in July 1991
NBER Program(s):The Productivity, Innovation, and Entrepreneurship Program

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 reviews 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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Document Object Identifier (DOI): 10.3386/w3768

Published:

• The Scandinavian Journal of Economics, Vol. 94, 1992 Supplement, pp. 29-47. citation courtesy of
• The Search for R&D Spillovers, Zvi Griliches. in R&D and Productivity: The Econometric Evidence, Griliches. 1998

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