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How to measure patent thickets--A novel approach

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Author Info

  • 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.

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Bibliographic Info

Article provided by Elsevier in its journal Economics Letters.

Volume (Year): 111 (2011)
Issue (Month): 1 (April)
Pages: 6-9

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Handle: RePEc:eee:ecolet:v:111:y:2011:i:1:p:6-9

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Web page: http://www.elsevier.com/locate/ecolet

Related research

Keywords: Patenting Patent thickets Patent portfolio races Complexity;

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Citations

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Cited by:
  1. 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.
  2. Jérôme Danguy & Gaétan de Rassenfosse & Bruno Van Pottelsberghe, 2013. "On the Origins of the Worldwide Surge in Patenting: An Industry Perspective on the R&D-patent Relationship," Working Papers ECARES 2013/143016, ULB -- Universite Libre de Bruxelles.
  3. 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.
  4. Philippe Aghion & Peter Howitt & Susanne Prantl, 2013. "Patent Rights, Product Market Reforms, and Innovation," NBER Working Papers 18854, National Bureau of Economic Research, Inc.
  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. NAGAOKA Sadao & NISHIMURA Yoichiro, 2014. "Complementarity, Fragmentation, and the Effects of Patent Thickets," Discussion papers 14001, Research Institute of Economy, Trade and Industry (RIETI).
  8. 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.
  9. 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.
  10. Dr Chiara Rosazza Bondibene, 2012. "A Study of Patent Thickets," NIESR Discussion Papers 11129, National Institute of Economic and Social Research.
  11. 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.

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