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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 University of Manchester)

  • Sokbae 'Simon' Lee

    ()

    (Institute for Fiscal Studies and Seoul National University)

  • John Van Reenen

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. Head, Keith & Mayer, Thierry & Ries, John, 2007. "How Remote is the Offshoring Threat?," CEPR Discussion Papers 6542, C.E.P.R. Discussion Papers.
  2. 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.
  3. 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.
  4. Lee, Sokbae, 2008. "Estimating Panel Data Duration Models With Censored Data," Econometric Theory, Cambridge University Press, vol. 24(05), pages 1254-1276, October.
  5. Ridder, Geert & Tunali, Insan, 1999. "Stratified partial likelihood estimation," Journal of Econometrics, Elsevier, vol. 92(2), pages 193-232, October.
  6. Zvi Griliches, 1991. "The Search for R&D Spillovers," NBER Working Papers 3768, National Bureau of Economic Research, Inc.
  7. Bronwyn H. Hall & Adam B. Jaffe & Manuel Trajtenberg, 2001. "The NBER Patent Citation Data File: Lessons, Insights and Methodological Tools," NBER Working Papers 8498, National Bureau of Economic Research, Inc.
  8. Coe, D.T. & Helpman, E., 1993. "International R&D Spillovers," Papers 5-93, Tel Aviv.
  9. Jaffe, A.B. & Trajtenberg, M., 1998. "International Knowledge Flows: Evidence from Patent Citation," Papers 11-98, Tel Aviv.
  10. Ariel Pakes, 1986. "Patents as Options: Some Estimates of the Value of Holding European Patent Stocks," NBER Working Papers 1340, National Bureau of Economic Research, Inc.
  11. Peter Thompson & Melanie Fox-Kean, 2005. "Patent Citations and the Geography of Knowledge Spillovers: A Reassessment," American Economic Review, American Economic Association, vol. 95(1), pages 450-460, March.
  12. Rachel Griffith & Stephen Redding & John Van Reenen, 2000. "Mapping the two faces of R&D: productivity growth in a panel of OECD industries," IFS Working Papers W00/02, Institute for Fiscal Studies.
  13. Bernstein, Jeffrey I. & Mohnen, Pierre, 1998. "International R&D spillovers between U.S. and Japanese R&D intensive sectors," Journal of International Economics, Elsevier, vol. 44(2), pages 315-338, April.
  14. Nicholas Bloom & John Van Reenen, 2000. "Patents, productivity and market value: evidence from a panel of UK firms," IFS Working Papers W00/21, Institute for Fiscal Studies.
  15. Wooldridge, Jeffrey M., 2007. "Inverse probability weighted estimation for general missing data problems," Journal of Econometrics, Elsevier, vol. 141(2), pages 1281-1301, December.
  16. 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.
  17. Kim, E. Han & Morse, Adair & Zingales, Luigi, 2009. "Are elite universities losing their competitive edge?," Journal of Financial Economics, Elsevier, vol. 93(3), pages 353-381, September.
  18. repec:att:wimass:9607 is not listed on IDEAS
  19. Peter Thompson, 2004. "Patent Citations and the Geography of Knowledge Spillovers: Evidence from Inventor- and Examiner-Added Citations," Working Papers 0405, Florida International University, Department of Economics, revised Jun 2005.
  20. Horowitz, Joel L. & Lee, Sokbae, 2004. "Semiparametric estimation of a panel data proportional hazards model with fixed effects," Journal of Econometrics, Elsevier, vol. 119(1), pages 155-198, March.
  21. Keller, Wolfgang, 1998. "Are international R&D spillovers trade-related?: Analyzing spillovers among randomly matched trade partners," European Economic Review, Elsevier, vol. 42(8), pages 1469-1481, September.
  22. Carolyn L. Evans & James Harrigan, 2005. "Distance, Time, and Specialization: Lean Retailing in General Equilibrium," American Economic Review, American Economic Association, vol. 95(1), pages 292-313, March.
  23. James Harrigan & Carolyn Evans, 2004. "Distance, Time and Specialization," Econometric Society 2004 North American Winter Meetings 640, Econometric Society.
  24. 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.
  25. 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.
  26. Adair Morse, 2006. "Are elite universities losing their competitive edge?," Proceedings, Federal Reserve Bank of Cleveland.
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