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Identifying Technology Spillovers and Product Market Rivalry

  • Bloom, Nicholas
  • Schankerman, Mark
  • Van Reenen, John

Support for many R&D and technology policies relies on empirical evidence that R&D ‘spills over’ between firms. But there are two countervailing R&D spillovers: positive effects from technology spillovers and negative effects from business stealing by product market rivals. We develop a general framework showing that technology and product market spillovers have testable implications for a range of performance indicators, and exploit these using distinct measures of a firm’s position in technology space and product market space. We show using panel data on US firms between 1981 and 2001 that both technology and product market spillovers operate, but that net social returns are several times larger than private returns. The spillover effects are also revealed when we analyze three high-tech sectors in detail - pharmaceuticals, computer hardware and telecommunication equipment. Using the model we evaluate three R&D subsidy policies and show that the typical focus of support for small and medium firms may be misplaced.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 4912.

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Date of creation: Feb 2005
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Handle: RePEc:cpr:ceprdp:4912
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  1. Keller, Wolfgang, 2002. "International Technology Diffusion," CEPR Discussion Papers 3133, C.E.P.R. Discussion Papers.
  2. Lee, Tom & Wilde, Louis L, 1980. "Market Structure and Innovation: A Reformulation," The Quarterly Journal of Economics, MIT Press, vol. 94(2), pages 429-36, March.
  3. Charles I. Jones & John C. Williams, 1998. "Measuring The Social Return To R&D," The Quarterly Journal of Economics, MIT Press, vol. 113(4), pages 1119-1135, November.
  4. Daron Acemoglu & Philippe Aghion & Fabrizio Zilibotti, 2002. "Distance to Frontier, Selection, and Economic Growth," NBER Working Papers 9066, National Bureau of Economic Research, Inc.
  5. Jaffe, Adam B & Trajtenberg, Manuel & Henderson, Rebecca, 1993. "Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations," The Quarterly Journal of Economics, MIT Press, vol. 108(3), pages 577-98, August.
  6. Tor Jakob Klette & Zvi Griliches, 1994. "The Inconsistency of Common Scales Estimators when Output Prices are Unobserved and Endogenous," Discussion Papers 127, Research Department of Statistics Norway.
  7. Joris Pinkse & Margaret E. Slade & Craig Brett, 2002. "Spatial Price Competition: A Semiparametric Approach," Econometrica, Econometric Society, vol. 70(3), pages 1111-1153, May.
  8. Glenn C. Loury, 1976. "Market Structure and Innovation," Discussion Papers 256, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  9. Jasjit Singh, 2005. "Collaborative Networks as Determinants of Knowledge Diffusion Patterns," Management Science, INFORMS, vol. 51(5), pages 756-770, May.
  10. Cockburn, Iain & Henderson, Rebecca, 1994. "Racing to Invest? The Dynamics of Competition in Ethical Drug Discovery," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 3(3), pages 481-519, Fall.
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