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Patent Citations, the Value of Innovations and Path-Dependency

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  • Bulat Sanditov

    (CESPRI and MERIT, Bocconi University, Milano,Italy and Universiteit Maastricht.)

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    Abstract

    This paper examines how the framework of path-dependency and technological trajectories can be applied to explain the observed distribution of patent values as it is revealed in the distribution of patent citations. A very simple model of based on generalized Polya urn processes is proposed to describe evolution of patent values. It is shown that the model fits empirical distribution of patent citations (USPTO and EPO data) surprisingly well.

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    File URL: ftp://ftp.unibocconi.it/pub/RePEc/cri/papers/WP177Sanditov.pdf
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    Bibliographic Info

    Paper provided by KITeS, Centre for Knowledge, Internationalization and Technology Studies, Universita' Bocconi, Milano, Italy in its series KITeS Working Papers with number 177.

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    Length: 43 pages
    Date of creation: Nov 2005
    Date of revision: Nov 2005
    Handle: RePEc:cri:cespri:wp177

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    Related research

    Keywords: Size of Innovation; Patent Citations; Path-Dependency in Technical Change;

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    References

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    1. Scherer, Frederic M. & Harhoff, Dietmar & Vopel, Katrin, 1997. "Exploring the Tail of Patented Invention Value Distributions," ZEW Discussion Papers 97-30, ZEW - Zentrum für Europäische Wirtschaftsforschung / Center for European Economic Research.
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    3. Balconi, Margherita & Breschi, Stefano & Lissoni, Francesco, 2004. "Networks of inventors and the role of academia: an exploration of Italian patent data," Research Policy, Elsevier, vol. 33(1), pages 127-145, January.
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    5. repec:hal:cepnwp:halshs-00185579 is not listed on IDEAS
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    7. Andrea Bassanini & Giovanni Dosi, 1999. "Competing Technologies, Technological Monopolies and the Role of Convergence to a Stable Market Structure," LEM Papers Series 1999/03, Laboratory of Economics and Management (LEM), Sant'Anna School of Advanced Studies, Pisa, Italy.
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    21. Birchenhall, Chris, 1995. "Modular Technical Change and Genetic Algorithms," Computational Economics, Society for Computational Economics, vol. 8(3), pages 233-53, August.
    22. Jean O. Lanjouw & Ariel Pakes & Jonathan Putnam, 1996. "How to Count Patents and Value Intellectual Property: Uses of Patent Renewal and Application Data," NBER Working Papers 5741, National Bureau of Economic Research, Inc.
    23. Ariel Pakes & Mark Schankerman, 1979. "The Rate of Obsolescence Of Knowledge, Research Gestation Lags, and the Private Rate of Return to Research Resources," NBER Working Papers 0346, National Bureau of Economic Research, Inc.
    24. Zvi Griliches, 1984. "Market Value, R&D, and Patents," NBER Chapters, in: R & D, Patents, and Productivity, pages 249-252 National Bureau of Economic Research, Inc.
    25. Stefano Breschi & Francesco Lissoni, 2004. "Knowledge networks from patent data: Methodological issues and research targets," KITeS Working Papers 150, KITeS, Centre for Knowledge, Internationalization and Technology Studies, Universita' Bocconi, Milano, Italy, revised Jan 2004.
    26. Samuel S. Kortum, 1997. "Research, Patenting, and Technological Change," Econometrica, Econometric Society, vol. 65(6), pages 1389-1420, November.
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    Cited by:
    1. Carolina Castaldi & Bart Los, 2008. "The identification of important innovations using tail estimators," Innovation Studies Utrecht (ISU) working paper series 08-07, Utrecht University, Department of Innovation Studies, revised Feb 2008.

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