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Is distance dying at last? Falling home bias in fixed effects models of patent citations

  • Rachel Griffith

    ()

    (Institute for Fiscal Studies and IFS and Manchester)

  • Sokbae (Simon) Lee

    ()

    (Institute for Fiscal Studies)

  • John Van Reenen

    (Institute for Fiscal Studies)

We examine the "home bias" of knowledge spillovers (the idea that knowledge spreads more slowly over international boundaries than within them) as measured by the speed of patent citations. We present econometric evidence that the geographical localization of knowledge spillovers has fallen over time, as we would expect from the dramatic fall in communication and travel costs. Our proposed estimator controls for correlated fixed effects and censoring in duration models and we apply it to data on over two million patent citations between 1975 and 1999. Home bias is exaggerated in models that do not control for fixed effects. The fall in home bias over time is weaker for the pharmaceuticals and information/communication technology sectors where agglomeration externalities may remain strong.

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File URL: http://cemmap.ifs.org.uk/wps/cwp1811.pdf
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Paper provided by Centre for Microdata Methods and Practice, Institute for Fiscal Studies in its series CeMMAP working papers with number CWP18/11.

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Date of creation: May 2011
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Handle: RePEc:ifs:cemmap:18/11
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  1. Joel Horowitz & Sokbae (Simon) Lee, 2002. "Semiparametric estimation of a panel data proportional hazards model with fixed effects," CeMMAP working papers CWP21/02, Centre for Microdata Methods and Practice, Institute for Fiscal Studies.
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  3. Rachel Griffith & Stephen Redding & John Van Reenen, 2004. "Mapping the Two Faces of R&D: Productivity Growth in a Panel of OECD Industries," The Review of Economics and Statistics, MIT Press, vol. 86(4), pages 883-895, November.
  4. Griffith, Rachel & Harrison, Rupert & Van Reenen, John, 2004. "How Special is the Special Relationship? Using the Impact of US R&D Spillovers on UK Firms as a Test of Technology Sourcing," CEPR Discussion Papers 4698, C.E.P.R. Discussion Papers.
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  7. E. Han Kim & Adair Morse & Luigi Zingales, 2006. "Are Elite Universities Losing Their Competitive Edge?," NBER Working Papers 12245, National Bureau of Economic Research, Inc.
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  16. Bernstein, Jeffrey I. & Mohnen, Pierre, 1994. "International R&D Spillovers Between U.S. and Japanese R&D Intensive Sectors," Working Papers 94-20, C.V. Starr Center for Applied Economics, New York University.
  17. Adair Morse, 2006. "Are elite universities losing their competitive edge?," Proceedings, Federal Reserve Bank of Cleveland.
  18. Coe, David T & Helpman, Elhanan, 1993. "International R&D Spillovers," CEPR Discussion Papers 840, C.E.P.R. Discussion Papers.
  19. Hall, Bronwyn H & Jaffe, Adam B & Trajtenberg, Manuel, 2001. "The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools," CEPR Discussion Papers 3094, C.E.P.R. Discussion Papers.
  20. Zvi Griliches, 1998. "The Search for R&D Spillovers," NBER Chapters, in: R&D and Productivity: The Econometric Evidence, pages 251-268 National Bureau of Economic Research, Inc.
  21. Lee G. Branstetter & Mariko Sakakibara, 2002. "When Do Research Consortia Work Well and Why? Evidence from Japanese Panel Data," American Economic Review, American Economic Association, vol. 92(1), pages 143-159, March.
  22. Lee, Sokbae, 2008. "Estimating Panel Data Duration Models With Censored Data," Econometric Theory, Cambridge University Press, vol. 24(05), pages 1254-1276, October.
  23. Branstetter, Lee G., 2001. "Are knowledge spillovers international or intranational in scope?: Microeconometric evidence from the U.S. and Japan," Journal of International Economics, Elsevier, vol. 53(1), pages 53-79, February.
  24. Bronwyn H. Hall & Adam Jaffe & Manuel Trajtenberg, 2005. "Market Value and Patent Citations," RAND Journal of Economics, The RAND Corporation, vol. 36(1), pages 16-38, Spring.
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