Empirical Economics

, Volume 25, Issue 1, pp 127–148 | Cite as

R&D spillovers and productivity: Evidence from U.S. manufacturing microdata

  • Bart Los
  • Bart Verspagen


This paper deals with the estimation of the impact of technology spillovers on productivity at the firm level. Panel data for American manufacturing firms on sales, physical capital inputs, employment and R&D investments are linked to R&D data by industry. The latter data are used to construct four different sets of `indirect' R&D stocks, representing technology obtained through spillovers. The differences between two distinct kinds of spillovers are stressed. Cointegration analysis is introduced into production function estimation. Spillovers are found to have significant positive effects on productivity, although their magnitudes differ between high-tech, medium-tech and low-tech firms.

Key words: R&D spillovers, productivity, production functions, enterprise data 
JEL classifications: D24, O30, O31, O34 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Bart Los
    • 1
  • Bart Verspagen
    • 2
  1. 1.University of Groningen, Econometric Institute, Faculty of Economics, P.O. Box 800, 9700 AV Groningen, The Netherlands (e-mail:
  2. 2.ECIS, Eindhoven University of TechnologyNL

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