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Patent Protection and Innovation Over 150 Years

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  • Josh Lerner

Abstract

The paper seeks to understand the impact of the patent system on innovation by examining shifts in the strength of patent protection across sixty countries and a 150-year period. An examination of 177 policy changes reveals that strengthening patent protection appears to have few positive effects on patent applications by entities in the country undertaking the policy change, whether filings in Great Britain or the nation making the policy change are considered. Cross-sectional analyses suggest that the impact of patent protection-enhancing shifts were greater in nations with weaker initial protection and greater economic development, consistent with economic theory. I address concerns about the endogeneity of these changes by employing an instrumental variable approach.

Suggested Citation

  • Josh Lerner, 2002. "Patent Protection and Innovation Over 150 Years," NBER Working Papers 8977, National Bureau of Economic Research, Inc.
  • Handle: RePEc:nbr:nberwo:8977
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    Full references (including those not matched with items on IDEAS)

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    More about this item

    JEL classification:

    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O34 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Intellectual Property and Intellectual Capital

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