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Spatial Inventor Networks As Studied by Patent Coinventorship

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  • Ejermo, Olof

    () (CESIS - Centre of Excellence for Science and Innovation Studies, Royal Institute of Technology)

  • Karlsson, Charlie

    () (CESIS - Centre of Excellence for Science and Innovation Studies, Royal Institute of Technology)

Abstract

We study the structure of the spatial inventor networks in Sweden by examining the residence of inventors and coinventors in Swedish patent applications to the European Patent Office. Several factors are found to influence the spatial affinity. We find that spatial affinity is strongly influenced by the general size of the nodes, as measured by population. In addition, affinities are strongly influenced by distance, but different technologies responded differently to distance. The most distance-sensitive technology, i.e. with the highest agglomeration of coinventors, was almost three times as sensitive to distance as the least sensitive. Interestingly, "Information technology" was the least distance-sensitive technology, which would be in line with predictions of "the death of distance". Higher affinity was also registered for many technologies when more university researchers were employed in one of the regions. Hence, a technology division is appropriate for understanding the span of innovation networks over regions, and how these could develop in response to policy initiatives.

Suggested Citation

  • Ejermo, Olof & Karlsson, Charlie, 2004. "Spatial Inventor Networks As Studied by Patent Coinventorship," Working Paper Series in Economics and Institutions of Innovation 17, Royal Institute of Technology, CESIS - Centre of Excellence for Science and Innovation Studies.
  • Handle: RePEc:hhs:cesisp:0017
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    Cited by:

    1. Martha Prevezer & Pietro Panzarasa & Tore Opsahl, 2010. "Geographic clustering and network evolution of innovative activities: Evidence from China’s patents," Working Papers 32, Queen Mary, University of London, School of Business and Management, Centre for Globalisation Research.
    2. Martin Andersson & Olof Ejermo, 2005. "How does accessibility to knowledge sources affect the innovativeness of corporations?—evidence from Sweden," The Annals of Regional Science, Springer;Western Regional Science Association, vol. 39(4), pages 741-765, December.
    3. Christ, Julian P., 2009. "The geography and co-location of European technology-specific co-inventorship networks," Violette Reihe: Schriftenreihe des Promotionsschwerpunkts "Globalisierung und Beschäftigung" 31/2010, University of Hohenheim, Carl von Ossietzky University Oldenburg, Evangelisches Studienwerk.

    More about this item

    Keywords

    Inventor networks; localization; patents; Sweden; affinity;

    JEL classification:

    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O32 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Management of Technological Innovation and R&D
    • R12 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - Size and Spatial Distributions of Regional Economic Activity; Interregional Trade (economic geography)

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