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How Well Do Patent Citations Measure Flows of Technology? Evidence from French Innovation Surveys

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Author Info
DUGUET Emmanuel (EPEE - University of Evry)
MacGARVIE Megan (University of Boston)

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Abstract

Patent citation data are used in a growing body of economics and business research on technological diffusion. Research in this area uses “backward” citations to measure technological knowledge acquired by the patenting entities studied. “Forward” citations (citations to the firm’s patents made by other patents) have been interpreted as a measure of the knowledge diffusing outward from the patenting entity. Until now, there exists little evidence on whether or not patent citations are a good measure of knowledge flows. Our paper assesses the legitimacy of using European patent citations as a measure of technology flows. It uses information from the Community Innovation Survey (CIS) collected by the French Service des Statistiques Industrielles (SESSI), which contain firms’ responses to questions about their innovative activity. We show that patent citations are indeed related to firms’ statements about their acquisition and dispersion of new technology, but that the strength and statistical significance of this relationship varies across geographical regions and across channels of knowledge diffusion.

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Paper provided by EconWPA in its series Development and Comp Systems with number 0411018.

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Length: 30 pages
Date of creation: 16 Nov 2004
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Handle: RePEc:wpa:wuwpdc:0411018

Note: Type of Document - pdf; pages: 30
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Related research
Keywords: patent; citation; Community Innovation Survey; innovation; spillovers; count data;

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Find related papers by JEL classification:
O34 - Economic Development, Technological Change, and Growth - - Technological Change - - - Intellectual Property Rights
C35 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Discrete Regression and Qualitative Choice Models

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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.:
  1. Bronwyn H. Hall, Adam Jaffe and Manuel Trajtenberg., 2000. "Market Value and Patent Citations: A First Look," Economics Working Papers E00-277, University of California at Berkeley. [Downloadable!]
    Other versions:
  2. Emmanuel Duguet, 2006. "Innovation height, spillovers and tfp growth at the firm level: Evidence from French manufacturing," Economics of Innovation and New Technology, Taylor and Francis Journals, vol. 15(4-5), pages 415-442, June. [Downloadable!] (restricted)
    Other versions:
  3. Adam B. Jaffe & Manuel Trajtenberg & Michael S. Fogarty, 2000. "The Meaning of Patent Citations: Report on the NBER/Case-Western Reserve Survey of Patentees," NBER Working Papers 7631, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  4. Adam B. Jaffe & Manuel Trajtenberg & Rebecca Henderson, 1992. "Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations," NBER Working Papers 3993, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
    Other versions:
  5. Gourieroux, Christian & Monfort, Alain & Trognon, Alain, 1984. "Pseudo Maximum Likelihood Methods: Applications to Poisson Models," Econometrica, Econometric Society, vol. 52(3), pages 701-20, May. [Downloadable!] (restricted)
    Other versions:
  6. Crepon, B. & Duguet, E. & Mairesse, J., 1998. "Research Investment, Innovation and Productivity: An Econometric Analysis at the Firm Level," Papiers d'Economie Mathématique et Applications 98.15, Université Panthéon-Sorbonne (Paris 1).
  7. Hall, B. & Jaffe, A. & Trajtenberg, M., 2001. "The NBER Patent Citations Data File: Lessons, Insights and Methodological Tools," Papers 2001-29, Tel Aviv.
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  8. Jean O. Lanjouw & Mark Schankerman, 1999. "The Quality of Ideas: Measuring Innovation with Multiple Indicators," NBER Working Papers 7345, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  9. Dietmar Harhoff & Francis Narin & Frederic M. Scherer & Katrin Vopel, 1997. "Citation Frequency and the Value of Patented Innovation," CIG Working Papers FS IV 97-26, Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG). [Downloadable!]
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  10. Emmanuel Duguet & Isabelle Kabla, 1998. "Appropriation Strategy and the Motivations to Use the Patent System: An Econometric Analysis at the Firm Level in French Manufacturing," Annales d'Economie et de Statistique, ADRES, issue 49-50, pages 12, Janvier-J. [Downloadable!]
  11. Adam B. Jaffe & Manuel Trajtenberg, 1998. "International Knowledge Flows: Evidence from Patent Citations," NBER Working Papers 6507, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
    Other versions:
  12. Manuel Trajtenberg, 1990. "A Penny for Your Quotes: Patent Citations and the Value of Innovations," RAND Journal of Economics, The RAND Corporation, vol. 21(1), pages 172-187, Spring. [Downloadable!] (restricted)
  13. Adam B. Jaffe, 1986. "Technological Opportunity and Spillovers of R&D: Evidence from Firms' Patents, Profits and Market Value," NBER Working Papers 1815, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
    Other versions:
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Cited by:
(explanations, 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.)

  1. Ioana Popovici, 2005. "Outward R&D and Knowledge Spillovers: Evidence Using Patent Citations," Working Papers 0516, Florida International University, Department of Economics. [Downloadable!]
  2. Emmanuel Duguet & Stéphanie Monjon, 2004. "Is innovation persistent at the firm Level . An econometric examination comparing the propensity score and regression methods," Cahiers de la Maison des Sciences Economiques v04075, Université Panthéon-Sorbonne (Paris 1). [Downloadable!]
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