Advanced Search
MyIDEAS: Login

Incidence and Growth of Patent Thickets - The Impact of Technological Opportunities and Complexity

Contents:

Author Info

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

Abstract

We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of patenting in complex and discrete technologies. The model captures how competition for patent portfolios and complementarity of patents affect patenting incentives. We show that lower technological opportunities increase patenting incentives in complex technologies while they decrease incentives in discrete technologies. Also, more competitors increase patenting incentives in complex technologies and reduce them in discrete technologies. To test these predictions a new measure of the density of patent thickets is introduced. European patent citations are used to construct measures of fragmentation and technological opportunity. Our empirical analysis is based on a panel capturing patenting behavior of 2074 firms in 30 technology areas over 15 years. GMM estimation results confirm the predictions of our theoretical model. The results show that patent thickets exist in 9 out of 30 technology areas. We find that decreased technological opportunities are a surprisingly strong driver of patent thicket growth.

Download Info

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
File URL: http://www.cepr.org/pubs/dps/DP6900.asp
Download Restriction: CEPR Discussion Papers are free to download for our researchers, subscribers and members. If you fall into one of these categories but have trouble downloading our papers, please contact us at subscribers@cepr.org

As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.

Bibliographic Info

Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 6900.

as in new window
Length:
Date of creation: Jul 2008
Date of revision:
Handle: RePEc:cpr:ceprdp:6900

Contact details of provider:
Postal: Centre for Economic Policy Research, 77 Bastwick Street, London EC1V 3PZ.
Phone: 44 - 20 - 7183 8801
Fax: 44 - 20 - 7183 8820

Order Information:
Email:

Related research

Keywords: complexity; patent portfolios; patent thickets; patenting; technological opportunities;

Other versions of this item:

Find related papers by JEL classification:

This paper has been announced in the following NEP Reports:

References

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
as in new window
  1. Michael Noel & Mark Schankerman, 2006. "Strategic Patenting and Software Innovation," CEP Discussion Papers dp0740, Centre for Economic Performance, LSE.
  2. James Bessen, 2004. "Patent Thickets: Strategic Patenting of Complex Technologies," Working Papers 0401, Research on Innovation.
  3. Arellano, Manuel & Bover, Olympia, 1995. "Another look at the instrumental variable estimation of error-components models," Journal of Econometrics, Elsevier, vol. 68(1), pages 29-51, July.
  4. Blundell, R. & Bond, S., 1995. "Initial Conditions and Moment Restrictions in Dynamic Panel Data Models," Economics Papers 104, Economics Group, Nuffield College, University of Oxford.
  5. Jaffe Adam B. & Lerner Josh, 2006. "Innovation and Its Discontents," Capitalism and Society, De Gruyter, vol. 1(3), pages 1-36, December.
  6. Lemley, Mark A. & Shapiro, Carl, 2004. "Probabilistic Patents," Competition Policy Center, Working Paper Series qt9xf1488p, Competition Policy Center, Institute for Business and Economic Research, UC Berkeley.
  7. Noel, Michael D. & Schankerman, Mark, 2006. "Strategic Patenting and Software Innovation," CEPR Discussion Papers 5701, C.E.P.R. Discussion Papers.
  8. Nancy Gallini and Suzanne Scotchmer., 2001. "Intellectual Property: When Is It the Best Incentive System?," Economics Working Papers E01-303, University of California at Berkeley.
  9. Rabah Amir, 2005. "Supermodularity and Complementarity in Economics: An Elementary Survey," Southern Economic Journal, Southern Economic Association, vol. 71(3), pages 636-660, January.
  10. Windmeijer, Frank, 2005. "A finite sample correction for the variance of linear efficient two-step GMM estimators," Journal of Econometrics, Elsevier, vol. 126(1), pages 25-51, May.
  11. Kortum, Samuel & Lerner, Josh, 1998. "Stronger protection or technological revolution: what is behind the recent surge in patenting?," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 48(1), pages 247-304, June.
  12. Xavier Vives, 2001. "Oligopoly Pricing: Old Ideas and New Tools," MIT Press Books, The MIT Press, edition 1, volume 1, number 026272040x, December.
  13. Michael Noel & Mark Schankerman, 2006. "Strategic Patenting and Software Innovation," STICERD - Economics of Industry Papers 43, Suntory and Toyota International Centres for Economics and Related Disciplines, LSE.
  14. Kazuhiko Hayakawa, 2006. "The Asymptotic Properties of the System GMM Estimator in Dynamic Panel Data Models When Both N and T are Large," Hi-Stat Discussion Paper Series d05-129, Institute of Economic Research, Hitotsubashi University.
  15. Bronwyn Hall, 2004. "Exploring the patent explosion," ESRC Centre for Business Research - Working Papers wp291, ESRC Centre for Business Research.
  16. Alvarez, J. & Arellano, M., 1998. "The Time Series and Cross-Section Asymptotics of Dynamic Panel Data Estimators," Papers 9808, Centro de Estudios Monetarios Y Financieros-.
  17. Steve Bond, 2002. "Dynamic panel data models: a guide to microdata methods and practice," CeMMAP working papers CWP09/02, Centre for Microdata Methods and Practice, Institute for Fiscal Studies.
  18. 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.
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.
as in new window

Cited by:
  1. 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.
  2. Philippe Aghion & Peter Howitt & Susanne Prantl, 2013. "Patent Rights, Product Market Reforms, and Innovation," NBER Working Papers 18854, National Bureau of Economic Research, Inc.
  3. David S. Abrams & Ufuk Akcigit & Jillian Popadak, 2013. "Patent Value and Citations: Creative Destruction or Strategic Disruption?," NBER Working Papers 19647, National Bureau of Economic Research, Inc.
  4. Thorsten V. Braun & Sebastian Krispin & Erik E. Lehmann, 2009. "Entrepreneurial Human Capital, Complementary Assets, and Takeover Probability," Discussion Paper Series 307, Universitaet Augsburg, Institute for Economics.
  5. Katharine Rockett, 2009. "Property Rights and Invention," Economics Discussion Papers 663, University of Essex, Department of Economics.
  6. David S. Abrams & Ufuk Akcigit & Jillian Popadak, 2013. "Patent Value and Citations: Creative Destruction or Strategic Disruption?," PIER Working Paper Archive 13-065, Penn Institute for Economic Research, Department of Economics, University of Pennsylvania.
  7. Doh-Shin Jeon & Yassine Lefouili, 2013. "Cross-Licensing and Competition," Working Papers 13-11, NET Institute.
  8. Schwiebacher, Franz, 2012. "Complementary assets, patent thickets and hold-up threats: Do transaction costs undermine investments in innovation?," ZEW Discussion Papers 12-015, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.
  9. NAGAOKA Sadao & NISHIMURA Yoichiro, 2014. "Complementarity, Fragmentation, and the Effects of Patent Thickets," Discussion papers 14001, Research Institute of Economy, Trade and Industry (RIETI).
  10. Siebert, Ralph Bernd & Graevenitz, Georg von, 2010. "Licensing in the Patent Thicket - Timing and Benefits," MPRA Paper 24007, University Library of Munich, Germany.
  11. Sternitzke, Christian, 2013. "An exploratory analysis of patent fencing in pharmaceuticals: The case of PDE5 inhibitors," Research Policy, Elsevier, vol. 42(2), pages 542-551.
  12. Hall, Bronwyn H. & Thoma, Grid & Torrisi, Salvatore, 2010. "Financial Patenting in Europe," MERIT Working Papers 011, United Nations University - Maastricht Economic and Social Research Institute on Innovation and Technology (MERIT).
  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. 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.
  15. Grimpe, Christoph & Hussinger, Katrin, 2014. "Pre-empted patents, infringed patents and firms’ participation in markets for technology," Research Policy, Elsevier, vol. 43(3), pages 543-554.
  16. Carsten Fink & Mosahid Khan & Hao Zhou, 2013. "Exploring the worldwide patent surge," WIPO Economic Research Working Papers 12, World Intellectual Property Organization - Economics and Statistics Division.

Lists

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

Statistics

Access and download statistics

Corrections

When requesting a correction, please mention this item's handle: RePEc:cpr:ceprdp:6900. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ().

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.