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Stars and comets: an exploration of the patent universe

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  • Carlo Menon

    (Bank of Italy)

Abstract

The analysis of patent and citation data has become a popular source of evidence on localized knowledge spillovers and innovation. Nevertheless, one aspect has been overlooked: the patent distribution across inventors is extremely skewed, as many inventors -- the comets -- register one or few patents, while a small number of inventors -- the stars -- register many patents. This raises a number of questions relating to the geography of innovation: do different categories of inventors interact with the local economic environment in the same way? Are they equally distributed over space or do they tend to concentrate? Is spatial proximity beneficial for their activity? Using a rich database on US inventors, we provide evidence suggesting that the two categories of patents are associated with different kinds of cities. We then test whether the activity of stars is beneficial for local comets, finding that a 10% increase in the number of patents authored by star inventors leads to a 3% increase in the number of patents developed by comet inventors.

Suggested Citation

  • Carlo Menon, 2011. "Stars and comets: an exploration of the patent universe," Temi di discussione (Economic working papers) 784, Bank of Italy, Economic Research and International Relations Area.
    • Handle: RePEc:bdi:wptemi:td_784_11
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    References listed on IDEAS

    as
    1. Silverberg, Gerald & Verspagen, Bart, 2007. "The size distribution of innovations revisited: An application of extreme value statistics to citation and value measures of patent significance," Journal of Econometrics, Elsevier, vol. 139(2), pages 318-339, August.
    2. Natarajan Balasubramanian & Jagadeesh Sivadasan, 2011. "What Happens When Firms Patent? New Evidence from U.S. Economic Census Data," The Review of Economics and Statistics, MIT Press, vol. 93(1), pages 126-146, February.
    3. Paul Almeida & Bruce Kogut, 1999. "Localization of Knowledge and the Mobility of Engineers in Regional Networks," Management Science, INFORMS, vol. 45(7), pages 905-917, July.
    4. Michael Greenstone & Richard Hornbeck & Enrico Moretti, 2008. "Identifying Agglomeration Spillovers: Evidence from Million Dollar Plants," Working Paper series 36_08, Rimini Centre for Economic Analysis.
    5. Giovanni Peri, 2005. "Determinants of Knowledge Flows and Their Effect on Innovation," The Review of Economics and Statistics, MIT Press, vol. 87(2), pages 308-322, May.
    6. Rachel Griffith & Sokbae Lee & John Van Reenen, 2008. "Is Distance Dying at Last?," CentrePiece - The magazine for economic performance 240, Centre for Economic Performance, LSE.
    7. repec:rim:rimwps:36-08 is not listed on IDEAS
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    Citations

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    Cited by:

    1. Alessandra Scandura, 2013. "The role of scientific and market knowledge in the inventive process: evidence from a survey of industrial inventors," ERSA conference papers ersa13p128, European Regional Science Association.
    2. Carlino, Gerald & Kerr, William R., 2015. "Agglomeration and Innovation," Handbook of Regional and Urban Economics, in: Gilles Duranton & J. V. Henderson & William C. Strange (ed.), Handbook of Regional and Urban Economics, edition 1, volume 5, chapter 0, pages 349-404, Elsevier.
    3. Martin Kalthaus, 2020. "Knowledge recombination along the technology life cycle," Journal of Evolutionary Economics, Springer, vol. 30(3), pages 643-704, July.
    4. Alessandra Scandura, 2019. "The role of scientific and market knowledge in the inventive process: evidence from a survey of industrial inventors," The Journal of Technology Transfer, Springer, vol. 44(4), pages 1029-1069, August.
    5. Carlino, Gerald & Kerr, William R., 2015. "Agglomeration and Innovation," Handbook of Regional and Urban Economics, in: Gilles Duranton & J. V. Henderson & William C. Strange (ed.), Handbook of Regional and Urban Economics, edition 1, volume 5, chapter 0, pages 349-404, Elsevier.
    6. Nathan, Max, 2011. "Ethnic inventors, diversity and innovation in the UK: evidence from patents microdata," LSE Research Online Documents on Economics 58329, London School of Economics and Political Science, LSE Library.
    7. Megha Mukim, 2012. "Does Agglomeration Boost Innovation? An Econometric Evaluation," Spatial Economic Analysis, Taylor & Francis Journals, vol. 7(3), pages 357-380, September.
    8. repec:zbw:bofrdp:2015_027 is not listed on IDEAS
    9. repec:bof:bofrdp:urn:nbn:fi:bof-201512111472 is not listed on IDEAS
    10. repec:zbw:bofrdp:urn:nbn:fi:bof-201512111472 is not listed on IDEAS
    11. Hohberger, Jan, 2016. "Does it pay to stand on the shoulders of giants? An analysis of the inventions of star inventors in the biotechnology sector," Research Policy, Elsevier, vol. 45(3), pages 682-698.

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    More about this item

    Keywords

    localized knowledge spillovers; patents; innovation;
    All these keywords.

    JEL classification:

    • R10 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - General
    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives

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