The Mutual Relation between Patents and R&D

Hans Ophem, Erik Brouwer, Alfred Kleinknecht and Pierre Mohnen
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Hans Ophem: University of Amsterdam
Erik Brouwer: PricewaterhouseCoopers (PwC)

Chapter 3 in Innovation and Firm Performance, 2002, pp 56-70 from Palgrave Macmillan

Abstract: Abstract Because of the lack of long time series on R&D and patents, few studies have examined the causal link in the Granger sense between these two innovation indicators. The existing evidence gathered by Griliches (1981), Pakes (1985), Hall et al. (1986) and Griliches et al. (1991) points to an almost instantaneous relationship, and, to the extent that any lag effects can be established, causality seems to run from R&D to patents. The Dutch innovation surveys which contain questions on patent applications allow us to re-examine this issue using information of four-year lagged amounts of R&D expenditures and numbers of patent applications for a sample of 460 firms from the 1992 survey that also responded to the 1988 survey. Section 3.2 discusses the model which relates R&D expenditures and patent count mutually. Section 3.3 introduces the data, and the estimation results are presented in Section 3.4. Section 3.5 concludes.

Keywords: Patent Application; Negative Binomial; Mutual Relation; Zero Count; Patent Count (search for similar items in EconPapers)
Date: 2002
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DOI: 10.1057/9780230595880_3

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