Patents and R and D at the Firm Level: A First Look
This is a first report from a larger study of inventive activity of U.S. firms and some of its consequences. It reports on the relationship between patents applied for and R&D expenditures based on data for 121 large corporations covering the 1968-1975 period. The main conclusion is that there is a statistically significant relationship between a firm's R&D expenditures and the number of patents it applied for and receives. This relationship is very strong in the cross-sectional dimension (squared partial correlations of .8 or higher). It is weaker in the within-firm time-series dimension (partial r[squared]'s of .2 to .3). Attempts to fit an unconstrained distributed lag relationship yields only significant coefficients for the first and last terms in the lag structure, indicating both a quick response of patenting to changes in R&D and a small but persistent effect of past R&D, the truncation of this long lag being reflected in a significant coefficient for R&D lagged five years. In spite of these difficulties, patent counts do measure something systematic and hence are worthy of further study.
|Date of creation:||Oct 1980|
|Date of revision:|
|Publication status:||published as Pakes, Ariel and Zvi Griliches. "Patents and R and D at the Firm Level: A First Report." Economics Letter, No. 5, (1980), pp. 377-381.|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
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- Universities-National Bureau Committee for Economic Research & Committee on Economic Growth of the Social Science Research Council, 1962. "The Rate and Direction of Inventive Activity: Economic and Social Factors," NBER Books, National Bureau of Economic Research, Inc, number univ62-1, September.
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- Simon Kuznets, 1962. "Inventive Activity: Problems of Definition and Measurement," NBER Chapters, in: The Rate and Direction of Inventive Activity: Economic and Social Factors, pages 19-52 National Bureau of Economic Research, Inc.
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"R & D and the Productivity Slowdown,"
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0346, National Bureau of Economic Research, Inc.
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