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A Dynamic Model of Cross Licensing

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Author Info

  • Yann Ménière

    (Ecole des Mines de Paris)

  • Sarah Parlane

    (University College Dublin)

Abstract

In sectors with cumulative and complementry technologies, some firms build patent portfolios in order to block their competitors' access to the technology and/or to negociate cross licensing agreements. We propose a dynamic model that captures this behaviour in an integrated duopoly where the firms invest successively in upstream patentable technologies and downstream marketable products. We study the impact of legal patent strength on competition and investment. We then consider two al- ternative settings. One where the firms cross license or pool their patents and another where the patent strength is restricetd. We verify whether and when such alternatives are socially efficient.

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File URL: http://www.ucd.ie/economics/research/papers/2004/WP04.24.pdf
File Function: First version, 2004
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Bibliographic Info

Paper provided by School Of Economics, University College Dublin in its series Working Papers with number 200424.

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Length: 28 pages
Date of creation: 05 Nov 2004
Date of revision:
Handle: RePEc:ucn:wpaper:200424

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  1. O'DONOGHUE, Ted & SCOTCHMER, Suzanne & THISSE, Jacques-François, . "Patent breadth, patent life, and the pace of technological progress," CORE Discussion Papers RP -1314, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  2. Shapiro, Carl, 2003. " Antitrust Limits to Patent Settlements," RAND Journal of Economics, The RAND Corporation, vol. 34(2), pages 391-411, Summer.
  3. Mark A. Lemley & Carl Shapiro, 2005. "Probabilistic Patents," Journal of Economic Perspectives, American Economic Association, vol. 19(2), pages 75-98, Spring.
  4. James Bessen & Eric Maskin, 2009. "Sequential innovation, patents, and imitation," RAND Journal of Economics, RAND Corporation, vol. 40(4), pages 611-635.
  5. Suzanne Scotchmer, 1991. "Standing on the Shoulders of Giants: Cumulative Research and the Patent Law," Journal of Economic Perspectives, American Economic Association, vol. 5(1), pages 29-41, Winter.
  6. James Bessen & Robert M. Hunt, 2004. "An empirical look at software patents," Working Papers 03-17, Federal Reserve Bank of Philadelphia.
  7. Kenneth Arrow, 1962. "Economic Welfare and the Allocation of Resources for Invention," NBER Chapters, in: The Rate and Direction of Inventive Activity: Economic and Social Factors, pages 609-626 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. James Bessen, 2004. "Patent Thickets: Strategic Patenting of Complex Technologies," Working Papers 0401, Research on Innovation.
  10. Mazzoleni, Roberto & Nelson, Richard R., 1998. "The benefits and costs of strong patent protection: a contribution to the current debate," Research Policy, Elsevier, vol. 27(3), pages 273-284, July.
  11. Hall, Bronwyn H & Ziedonis, Rosemarie Ham, 2001. "The Patent Paradox Revisited: An Empirical Study of Patenting in the U.S. Semiconductor Industry, 1979-1995," RAND Journal of Economics, The RAND Corporation, vol. 32(1), pages 101-28, Spring.
  12. Fershtman, C. & Kamien, M.I., 1991. "Cross Licensing of Complementary Technologies," Papers 1-91, Tel Aviv.
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