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How to measure patent thickets--A novel approach

Author

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  • von Graevenitz, Georg
  • Wagner, Stefan
  • Harhoff, Dietmar

Abstract

This paper provides a direct measure of the density of patent thickets based on patent citations. We discuss the algorithm that generates the measure and present descriptive results validating it. Moreover, we identify technology areas particularly affected by patent thickets.

Suggested Citation

  • von Graevenitz, Georg & Wagner, Stefan & Harhoff, Dietmar, 2011. "How to measure patent thickets--A novel approach," Economics Letters, Elsevier, vol. 111(1), pages 6-9, April.
  • Handle: RePEc:eee:ecolet:v:111:y:2011:i:1:p:6-9
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    References listed on IDEAS

    as
    1. Georg Graevenitz & Stefan Wagner & Dietmar Harhoff, 2013. "Incidence and Growth of Patent Thickets: The Impact of Technological Opportunities and Complexity," Journal of Industrial Economics, Wiley Blackwell, vol. 61(3), pages 521-563, September.
    2. Jaffe, Adam B., 2000. "The U.S. patent system in transition: policy innovation and the innovation process," Research Policy, Elsevier, vol. 29(4-5), pages 531-557, April.
    3. Carl Shapiro, 2001. "Navigating the Patent Thicket: Cross Licenses, Patent Pools, and Standard Setting," NBER Chapters,in: Innovation Policy and the Economy, Volume 1, pages 119-150 National Bureau of Economic Research, Inc.
    4. Bronwyn H. Hall, 2005. "Exploring the Patent Explosion," The Journal of Technology Transfer, Springer, vol. 30(2_2), pages 35-48, January.
    5. 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.
    6. 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 101-128, Spring.
    7. Kortum, Samuel & Lerner, Josh, 1999. "What is behind the recent surge in patenting?1," Research Policy, Elsevier, vol. 28(1), pages 1-22, January.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
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    Cited by:

    1. Dr Chiara Rosazza Bondibene, 2012. "A Study of Patent Thickets," National Institute of Economic and Social Research (NIESR) Discussion Papers 401, National Institute of Economic and Social Research.
    2. Alfonso Gambardella & Dietmar Harhoff & Bart Verspagen, 2017. "The economic value of patent portfolios," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 26(4), pages 735-756, December.
    3. Olga Kokshagina & Pascal Le Masson & Benoit Weil, 2017. "Should we manage the process of inventing? Designing for patentability," Post-Print hal-01481889, HAL.
    4. repec:bla:jinfst:v:68:y:2017:i:6:p:1360-1374 is not listed on IDEAS
    5. repec:spr:scient:v:90:y:2012:i:2:d:10.1007_s11192-011-0532-5 is not listed on IDEAS
    6. Stefano Comino & Fabio Maria Manenti, 2015. "Intellectual Property and Innovation in Information and Communication Technology (ICT)," JRC Working Papers JRC97541, Joint Research Centre (Seville site).
    7. Dietmar Harhoff & Georg von Graevenitz & Stefan Wagner, 2016. "Conflict Resolution, Public Goods, and Patent Thickets," Management Science, INFORMS, vol. 62(3), pages 704-721, March.
    8. NAGAOKA Sadao & NISHIMURA Yoichiro, 2014. "Complementarity, Fragmentation, and the Effects of Patent Thickets," Discussion papers 14001, Research Institute of Economy, Trade and Industry (RIETI).
    9. Philippe Aghion & Peter Howitt & Susanne Prantl, 2015. "Patent rights, product market reforms, and innovation," Journal of Economic Growth, Springer, vol. 20(3), pages 223-262, September.
    10. Bronwyn Hall & Christian Helmers & Mark Rogers & Vania Sena, 2014. "The Choice between Formal and Informal Intellectual Property: A Review," Journal of Economic Literature, American Economic Association, vol. 52(2), pages 375-423, June.
    11. Jérôme Danguy & Gaetan de Rassenfosse & Bruno van Pottelsberghe de la Potterie, 2014. "On the origins of the worldwide surge in patenting: an industry perspective on the R&D–patent relationship," Industrial and Corporate Change, Oxford University Press, vol. 23(2), pages 535-572.
    12. Danguy, Jérôme & de Rassenfosse, Gaétan & van Pottelsberghe de la Potterie, Bruno, 2010. "The R&D-patent relationship: An industry perspective," CEPR Discussion Papers 8145, C.E.P.R. Discussion Papers.
    13. Christian Le Bas & Julien Pénin, 2014. "Patents and innovation : Are the brakes broken, or how to restore patents’ dynamic efficiency ?," Working Papers of BETA 2014-02, Bureau d'Economie Théorique et Appliquée, UDS, Strasbourg.
    14. Doh-Shin Jeon & Yassine Lefouili, 2013. "Cross-Licensing and Competition," Working Papers 13-11, NET Institute.
    15. Adam B. Jaffe & Gaétan de Rassenfosse, 2017. "Patent citation data in social science research: Overview and best practices," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 68(6), pages 1360-1374, June.
    16. repec:spr:scient:v:112:y:2017:i:2:d:10.1007_s11192-017-2411-1 is not listed on IDEAS
    17. Laurie Ciaramella & Catalina Martínez & Yann Ménière, 2017. "Tracking patent transfers in different European countries: methods and a first application to medical technologies," Scientometrics, Springer;Akadémiai Kiadó, vol. 112(2), pages 817-850, August.
    18. Lechevalier, Sébastien & Nishimura, Junichi & Storz, Cornelia, 2014. "Diversity in patterns of industry evolution: How an intrapreneurial regime contributed to the emergence of the service robot industry," Research Policy, Elsevier, vol. 43(10), pages 1716-1729.
    19. Wen Wen & Marco Ceccagnoli & Chris Forman, 2013. "Patent Commons, Thickets, and Open Source Software Entry by Start-Up Firms," NBER Working Papers 19394, National Bureau of Economic Research, Inc.
    20. Régibeau, P & Rockett, K & Mariam, S, 2012. "Patent Pendency, Learning Effects, and Innovation Importance at the US Patent Office," Economics Discussion Papers 2863, University of Essex, Department of Economics.
    21. Dietl, M & Skrok, & Benalcazar, P & GÄ…tkowski, M & Rockett, K, 2017. "Pendency and Thickets," Economics Discussion Papers 19979, University of Essex, Department of Economics.
    22. Fischer, Timo & Henkel, Joachim, 2012. "Patent trolls on markets for technology – An empirical analysis of NPEs’ patent acquisitions," Research Policy, Elsevier, vol. 41(9), pages 1519-1533.
    23. Schwiebacher, Franz, 2013. "Does fragmented or heterogeneous IP ownership stifle investments in innovation?," ZEW Discussion Papers 13-096, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.

    More about this item

    Keywords

    Patenting Patent thickets Patent portfolio races Complexity;

    JEL classification:

    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L20 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - General
    • 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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