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Does it matter where patent citations come from? Inventor versus examiner citations in European patents

Author

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  • Criscuolo, P.

    (Tanaka Business School, Imperial College, London)

  • Verspagen, B.

    (ECIS, Eindhoven University of Technology)

Abstract

This paper investigates whether the distinction between patent citations added by the inventor or the examiner is relevant for the issue of geographical concentration of knowledge flows (as embodied in citations). The distinction between inventor and examiner citations enables us to work with a more refined citation indicator of knowledge flows. We use information in the search reports of patent examiners at the European Patent Office to construct our dataset of regional patenting in Europe, and apply various econometric models to investigate our research question. The findings point to a significant localization effect of inventor citations, after controlling for various other factors, and hence suggest that knowledge flows are indeed geographically concentrated. This holds true also for a sub-sample of patents owned by 169 large multinational enterprises (MNEs). The results for the sample of MNEs suggest that multinational firms seek out specific regional knowledge specializations (and hence at least partly reinforce geographical concentration), but are also able to transfer knowledge "easier" over larger distances.
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Suggested Citation

  • Criscuolo, P. & Verspagen, B., 2005. "Does it matter where patent citations come from? Inventor versus examiner citations in European patents," Working Papers 05.06, Eindhoven Center for Innovation Studies.
    • Handle: RePEc:ein:tuecis:0506
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    References listed on IDEAS

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    Cited by:

    1. Si Hyung Joo & Yeonbae Kim, 2010. "Measuring relatedness between technological fields," Scientometrics, Springer;Akadémiai Kiadó, vol. 83(2), pages 435-454, May.
    2. Crespi, Gustavo & Criscuolo, Chiara & Haskel, Jonathan E. & Slaughter, Matthew, 2007. "Productivity growth, knowledge flows and spillovers," LSE Research Online Documents on Economics 19735, London School of Economics and Political Science, LSE Library.
    3. Joaquín M. Azagra-Caro & Ignacio Fernández-de-Lucio & François Perruchas & Pauline Mattsson, 2009. "What do patent examiner inserted citations indicate for a region with low absorptive capacity?," Scientometrics, Springer;Akadémiai Kiadó, vol. 80(2), pages 441-455, August.

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