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Technological and geographical proximity effects on knowledge spillovers: evidence from the US patent citations

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  • Luigi Aldieri

Abstract

The purpose of this paper is to investigate the pattern of knowledge flows as indicated by the patent citations in three areas: USA, Japan and Europe. In each economic area, we use information from United States Patent and Trademarks Office data to assess empirically the impact of the technological and geographical proximities for 530 international firms. In particular, the contribution to the existing literature is twofold: first, we use an international sample in such a way that we may compare the empirical results among different economic markets; second, we extend the analysis of the determinants of knowledge spillovers, taking into account the time dimension of the effects of the proximities. In order to compute the technological proximity, we follow the methodology developed by A.B. Jaffe (1986. Technological opportunity and spillovers of R&D: Evidence from firms’ patents, profits and market value. American Economic Review 76, no. 5: 984--1001), where a technological vector is based on the distribution of patents of each firm across technology classes. As far as the geographic proximity is concerned, we use the latitude and the longitude coordinates of the city in which each firm is situated to obtain the distance, in miles, between the firms. The empirical results, in line with results from previous studies, indicate that there is a statistically significant relationship between the knowledge flows, proxied by the patent citations, and the proximities, but the effects are rather differentiated according to the proximity type.

Suggested Citation

  • Luigi Aldieri, 2011. "Technological and geographical proximity effects on knowledge spillovers: evidence from the US patent citations," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 20(6), pages 597-607, January.
  • Handle: RePEc:taf:ecinnt:v:20:y:2011:i:6:p:597-607
    DOI: 10.1080/10438599.2011.554632
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    Citations

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    Cited by:

    1. McNamee, Robert C., 2013. "Can’t see the forest for the leaves: Similarity and distance measures for hierarchical taxonomies with a patent classification example," Research Policy, Elsevier, vol. 42(4), pages 855-873.
    2. repec:spr:qualqt:v:51:y:2017:i:4:d:10.1007_s11135-016-0353-y is not listed on IDEAS
    3. Aldieri, Luigi & Vinci, Concetto Paolo, 2015. "R&D Migration: a cross-national analysis," MPRA Paper 62541, University Library of Munich, Germany.
    4. Morescalchi, Andrea & Pammolli, Fabio & Penner, Orion & Petersen, Alexander M. & Riccaboni, Massimo, 2015. "The evolution of networks of innovators within and across borders: Evidence from patent data," Research Policy, Elsevier, vol. 44(3), pages 651-668.
    5. Luigi Aldieri & Concetto Paolo Vinci, 2016. "Knowledge Migration: A Cross-National Analysis," De Economist, Springer, vol. 164(2), pages 109-123, June.
    6. Kyriakos Drivas & Claire Economidou, 2015. "Is geographic nearness important for trading ideas? Evidence from the US," The Journal of Technology Transfer, Springer, vol. 40(4), pages 629-662, August.
    7. Aldieri, Luigi & Aprile, Maria Carmela & Vinci, Concetto Paolo, 2015. "R&D Spillovers Effects on strategic behaviour of Large International Firms," MPRA Paper 63402, University Library of Munich, Germany.
    8. repec:ibn:ijefaa:v:9:y:2017:i:7:p:106-113 is not listed on IDEAS
    9. Luigi Aldieri & Concetto Paolo Vinci, 2017. "Quantile Regression for Panel Data: An Empirical Approach for Knowledge Spillovers Endogeneity," International Journal of Economics and Finance, Canadian Center of Science and Education, vol. 9(7), pages 106-113, July.
    10. Chiara Criscuolo & Angelo Secchi, 2016. "Resources (mis)allocation, innovation and the competitiveness of Europe," Economia e Politica Industriale: Journal of Industrial and Business Economics, Springer;Associazione Amici di Economia e Politica Industriale, vol. 43(1), pages 1-9, March.
    11. Aldieri, Luigi & Kotsemir, Maxim & Vinci, Concetto Paolo, 2017. "Jacobian spillovers in environmental technological proximity: the role of Mahalanobis index on European patents within the Triad," MPRA Paper 77274, University Library of Munich, Germany.
    12. Klaus Kultti & Tuomas Takalo & Tanja Tanayama, 2015. "R&D spillovers and information exchange: a case study," Eurasian Economic Review, Springer;Eurasia Business and Economics Society, vol. 5(1), pages 63-76, June.
    13. Iritié, B. G. Jean Jacques, 2016. "Economic issues of innovation clusters-based industrial policy : a critical overview," EconStor Preprints 142746, ZBW - German National Library of Economics.

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