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How to measure patent thickets – a novel approach

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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.

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File URL: http://epub.ub.uni-muenchen.de/10962/2/vonGraevenitz_Harhoff_Wagner_09.pdf
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Bibliographic Info

Paper provided by University of Munich, Munich School of Management in its series Discussion Papers in Business Administration with number 10962.

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Date of creation: 15 Jun 2009
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Handle: RePEc:lmu:msmdpa:10962

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Keywords: patenting; patent thickets; patent portfolio races; complexity;

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Cited by:
  1. Danguy, Jérôme & de Rassenfosse, Gaétan & van Pottelsberghe de la Potterie, Bruno, 2010. "The R&D-patent relationship: An industry perspective," EIB Papers 7/2009, European Investment Bank, Economics Department.
  2. 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.
  3. Dr Chiara Rosazza Bondibene, 2012. "A Study of Patent Thickets," NIESR Discussion Papers 11129, National Institute of Economic and Social Research.
  4. 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.
  5. 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.
  6. Doh-Shin Jeon & Yassine Lefouili, 2013. "Cross-Licensing and Competition," Working Papers 13-11, NET Institute.
  7. Jérôme Danguy & Gaétan de Rassenfosse & Bruno van Pottelsberghe de la Potterie, 2013. "On the Origins of the Worldwide Surge in Patenting: An Industry Perspective on the R&D-Patent Relationship," Melbourne Institute Working Paper Series wp2013n15, Melbourne Institute of Applied Economic and Social Research, The University of Melbourne.
  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. 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.
  10. 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.
  11. Philippe Aghion & Peter Howitt & Susanne Prantl, 2013. "Patent Rights, Product Market Reforms, and Innovation," NBER Working Papers 18854, National Bureau of Economic Research, Inc.
  12. 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.

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