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(When) Does Patent Protection Spur Cumulative Research Within Firms?

Author

Listed:
  • Ashish Arora
  • Sharon Belenzon
  • Matt Marx
  • Dror Shvadron

Abstract

We estimate the effect of patent protection on follow-on investments in corporate scientific research. We exploit a new method for identifying an exogenous reduction in the protection a granted patent provides. Using data on public, research-active firms between 1990 and 2015, we find that firms decrease follow-on research after a reduction in patent protection, as measured by a drop in internal citations to an associated scientific article. This effect is stronger for smaller firms and in industries where patents are traded less frequently. Our findings are consistent with a stylized model whereby patent protection is a strategic substitute for commercialization capability. Our results imply that stronger patents encourage follow-on research, but also shift the locus of research from big firms toward smaller firms and startups. As patent protection has strengthened since the mid-1980s, our results help explain why the American innovation ecosystem has undergone a growing division of innovative labor, where startups become primary sources of new ideas.

Suggested Citation

  • Ashish Arora & Sharon Belenzon & Matt Marx & Dror Shvadron, 2021. "(When) Does Patent Protection Spur Cumulative Research Within Firms?," NBER Working Papers 28880, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:28880
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    More about this item

    JEL classification:

    • O30 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - General
    • O32 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Management of Technological Innovation and R&D
    • 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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