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Fences and competition in patent races

  • Schneider, Cédric

This paper studies the behaviour of firms facing the decision to create a patent fence, defined as a portfolio of substitute patents. We set up a patent race model, where firms can decide either to patent their inventions, or to rely on secrecy. It is shown that firms build patent fences, when the duopoly profits net of R&D costs are positive. We also demonstrate that in this context, a firm will rely on secrecy when the speed of discovery of the subsequent invention is high compared to the competitor�s. Furthermore, we compare the model under the First-to-Invent and First-to-File legal rules. Finally, we analyze the welfare implications of patent fence

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File URL: https://mpra.ub.uni-muenchen.de/2087/1/MPRA_paper_2087.pdf
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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 2087.

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Date of creation: 02 Dec 2005
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Handle: RePEc:pra:mprapa:2087
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  1. Bronwyn H. Hall, 2004. "Exploring the Patent Explosion," NBER Working Papers 10605, National Bureau of Economic Research, Inc.
  2. Corinne Langinier, 2005. "Using patents to mislead rivals," Canadian Journal of Economics, Canadian Economics Association, vol. 38(2), pages 520-545, May.
  3. Mansfield, Edwin, 1985. "How Rapidly Does New Industrial Technology Leak Out?," Journal of Industrial Economics, Wiley Blackwell, vol. 34(2), pages 217-23, December.
  4. Samuel Kortum & Josh Lerner, 1997. "Stronger Protection or Technological Revolution: What is Behind the Recent Surge in Patenting?," NBER Working Papers 6204, National Bureau of Economic Research, Inc.
  5. Jensen, Richard & Thursby, Marie, 1996. "Patent Races, Product Standards, and International Competition," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 37(1), pages 21-49, February.
  6. James J. Anton & Dennis A. Yao, 2004. "Little Patents and Big Secrets: Managing Intellectual Property," RAND Journal of Economics, The RAND Corporation, vol. 35(1), pages 1-22, Spring.
  7. Wesley M. Cohen & Richard R. Nelson & John P. Walsh, 2000. "Protecting Their Intellectual Assets: Appropriability Conditions and Why U.S. Manufacturing Firms Patent (or Not)," NBER Working Papers 7552, National Bureau of Economic Research, Inc.
  8. Josh Lerner & Jean Tirole, 2002. "Efficient Patent Pools," NBER Working Papers 9175, National Bureau of Economic Research, Inc.
  9. Hall, Bronwyn H. & Graham, Stuart J. H. & Harhoff, Dietmar & Mowery, David C., 2003. "Prospects for Improving U.S. Patent Quality via Post-grant Opposition," Competition Policy Center, Working Paper Series qt4wq4g70r, Competition Policy Center, Institute for Business and Economic Research, UC Berkeley.
  10. Shapiro, Carl, 2000. "Navigating the Patent Thicket: Cross Licenses, Patent Pools, and Standard-Setting," Competition Policy Center, Working Paper Series qt4hs5s9wk, Competition Policy Center, Institute for Business and Economic Research, UC Berkeley.
  11. Suzanne Scotchmer & Jerry Green, 1990. "Novelty and Disclosure in Patent Law," RAND Journal of Economics, The RAND Corporation, vol. 21(1), pages 131-146, Spring.
  12. Nancy T. Gallini, 2002. "The Economics of Patents: Lessons from Recent U.S. Patent Reform," Journal of Economic Perspectives, American Economic Association, vol. 16(2), pages 131-154, Spring.
  13. Denicolo, Vincenzo, 1996. "Patent Races and Optimal Patent Breadth and Length," Journal of Industrial Economics, Wiley Blackwell, vol. 44(3), pages 249-65, September.
  14. Nancy T. Gallini, 1992. "Patent Policy and Costly Imitation," RAND Journal of Economics, The RAND Corporation, vol. 23(1), pages 52-63, Spring.
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