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How to measure patent thickets – a novel approach

Author

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

Abstract

The existing literature identifies patent thickets indirectly. In this paper we propose a novel measure based on patent citations which allows us to measure the density of patent thickets directly. We discuss the algorithm which generates the measure and present descriptive results validating it. Moreover, we identify technology areas which are particularly impacted by patent thickets.

Suggested Citation

  • Graevenitz, Georg von & Wagner, Stefan & Harhoff, Dietmar, 2009. "How to measure patent thickets – a novel approach," Discussion Papers in Business Administration 10962, University of Munich, Munich School of Management.
  • Handle: RePEc:lmu:msmdpa:10962
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    References listed on IDEAS

    as
    1. 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.
    2. Bronwyn H. Hall, 2005. "Exploring the Patent Explosion," The Journal of Technology Transfer, Springer, vol. 30(2_2), pages 35-48, January.
    3. Kortum, Samuel & Lerner, Josh, 1999. "What is behind the recent surge in patenting?1," Research Policy, Elsevier, pages 1-22.
    4. 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.
    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. Jaffe, Adam B., 2000. "The U.S. patent system in transition: policy innovation and the innovation process," Research Policy, Elsevier, pages 531-557.
    7. 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, pages 101-128.
    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. 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.
    2. Jérôme Danguy & Gaétan de Rassenfosse & Bruno Van Pottelsberghe, 2010. "The R&D‐Patent relationship: An Industry Perspective," Working Papers ECARES ECARES 2010-038, ULB -- Universite Libre de Bruxelles.
    3. Dietmar Harhoff & Georg von Graevenitz & Stefan Wagner, 2012. "Conflict resolution, public goods and patent thickets," ESMT Research Working Papers ESMT-12-04 (R1), ESMT European School of Management and Technology, revised 25 Mar 2013.
    4. 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.
    5. repec:bla:jemstr:v:26:y:2017:i:4:p:735-756 is not listed on IDEAS
    6. 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.
    7. Alfonso Gambardella & Dietmar Harhoff & Bart Verspagen, 2017. "The economic value of patent portfolios," Journal of Economics & Management Strategy, Wiley Blackwell, pages 735-756.
    8. Olga Kokshagina & Pascal Le Masson & Benoit Weil, 2017. "Should we manage the process of inventing? Designing for patentability," Post-Print hal-01481889, HAL.
    9. repec:spr:scient:v:112:y:2017:i:2:d:10.1007_s11192-017-2411-1 is not listed on IDEAS
    10. repec:spr:scient:v:90:y:2012:i:2:d:10.1007_s11192-011-0532-5 is not listed on IDEAS
    11. 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).
    12. Dietmar Harhoff & Georg von Graevenitz & Stefan Wagner, 2014. "Conflict Resolution, Public Goods and Patent Thickets," Working Papers 49, Queen Mary, University of London, School of Business and Management, Centre for Globalisation Research.
    13. Dietmar Harhoff & Georg von Graevenitz & Stefan Wagner, 2016. "Conflict Resolution, Public Goods, and Patent Thickets," Management Science, INFORMS, pages 704-721.
    14. NAGAOKA Sadao & NISHIMURA Yoichiro, 2014. "Complementarity, Fragmentation, and the Effects of Patent Thickets," Discussion papers 14001, Research Institute of Economy, Trade and Industry (RIETI).
    15. 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, pages 1716-1729.
    16. 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, pages 375-423.
    17. 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.
    18. Adams, Laurel & Régibeau, Pierre & Rockett, Katharine, 2014. "Incentives to create jobs: Regional subsidies, national trade policy and foreign direct investment," Journal of Public Economics, Elsevier, vol. 111(C), pages 102-119.
    19. Coles, M & Francesconi, M, 2013. "Equilibrium Search and the Impact of Equal Opportunities for Women," Economics Discussion Papers 9010, University of Essex, Department of Economics.
    20. 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, pages 535-572.
    21. Fischer, Timo & Henkel, Joachim, 2012. "Patent trolls on markets for technology – An empirical analysis of NPEs’ patent acquisitions," Research Policy, Elsevier, pages 1519-1533.
    22. Powdthavee, Nattavudh & Lekfuangfu, Warn N. & Wooden, Mark, 2013. "The Marginal Income Effect of Education on Happiness: Estimating the Direct and Indirect Effects of Compulsory Schooling on Well-Being in Australia," IZA Discussion Papers 7365, Institute for the Study of Labor (IZA).
    23. Helmut Fryges & Bettina Müller & Michaela Niefert, 2014. "Job machine, think tank, or both: what makes corporate spin-offs different?," Small Business Economics, Springer, vol. 43(2), pages 369-391, August.
    24. 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.
    25. Doh-Shin Jeon & Yassine Lefouili, 2013. "Cross-Licensing and Competition," Working Papers 13-11, NET Institute.

    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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