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

Author

Listed:
  • Rachel Griffith

    (Institute for Fiscal Studies and University of Manchester)

  • Sokbae (Simon) Lee

    (Institute for Fiscal Studies and Columbia University)

  • John Van Reenen

    (Institute for Fiscal Studies)

Abstract

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.

Suggested Citation

  • Rachel Griffith & Sokbae (Simon) Lee & John Van Reenen, 2011. "Is distance dying at last? Falling home bias in fixed effects models of patent citations," CeMMAP working papers CWP18/11, Centre for Microdata Methods and Practice, Institute for Fiscal Studies.
  • Handle: RePEc:ifs:cemmap:18/11
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    References listed on IDEAS

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    JEL classification:

    • O32 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Management of Technological Innovation and R&D
    • O33 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Technological Change: Choices and Consequences; Diffusion Processes
    • F23 - International Economics - - International Factor Movements and International Business - - - Multinational Firms; International Business

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