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Regional innovation measured by patent data – does quality matter?

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Author Info
Ejermo, Olof ()

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Abstract

Patent data play an important role as indicators of inventive and innovative activity across regions. This paper examines if the geographical distribution changes and in what direction if patent data are quality-adjusted. A quality index is constructed by means of factor analysis on the indicators forward citations and backward citations, family size and opposition incidence. Patent data over Swedish regions 1982-1999 are used to examine the distribution. The paper examines how the distribution has changed over time in the aggregate and on a technology-by-technology basis. When accounting for quality, patents become much more geographically concentrated than raw patents granted. Moreover, both concentrations have increased over time. Of the quality indicators, backward citations and family size seem to contribute most to concentration.

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Publisher Info
Paper provided by CIRCLE (Centre for Innovation, Research and Competence in the Learning Economy), Lund University in its series CIRCLE Electronic Working Paper Series with number 2007-08.

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Date of creation: 2007
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Handle: RePEc:cil:wpaper:121

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Related research
Keywords: Regions; patents; patent quality; Sweden;

Find related papers by JEL classification:
O31 - Economic Development, Technological Change, and Growth - - Technological Change - - - Innovation and Invention: Processes and Incentives
O32 - Economic Development, Technological Change, and Growth - - Technological Change - - - Management of Technological Innovation and R&D
O33 - Economic Development, Technological Change, and Growth - - Technological Change - - - Technological Change: Choices and Consequences; Diffusion Processes
O34 - Economic Development, Technological Change, and Growth - - Technological Change - - - Intellectual Property Rights
O38 - Economic Development, Technological Change, and Growth - - Technological Change - - - Government Policy
N5 - Economic History - - Agriculture, Natural Resources, Environment and Extractive Industries
O47 - Economic Development, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - Measurement of Economic Growth; Aggregate Productivity; Cross-Country Output Convergence
R58 - Urban, Rural, and Regional Economics - - Regional Government Analysis - - - Regional Development Policy

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    Other versions:
  2. Rebecca Henderson & Adam Jaffe & Manuel Trajtenberg, 2005. "Patent Citations and the Geography of Knowledge Spillovers: A Reassessment: Comment," American Economic Review, American Economic Association, vol. 95(1), pages 461-464, March. [Downloadable!]
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  6. Ejermo, Olof & Kander, Astrid, 2007. "Swedish business research productivity – improvements against international trends," CIRCLE Electronic Working Paper Series 2007-07, CIRCLE (Centre for Innovation, Research and Competence in the Learning Economy), Lund University. [Downloadable!]
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  11. Jaffe, Adam B, 1989. "Real Effects of Academic Research," American Economic Review, American Economic Association, vol. 79(5), pages 957-70, December. [Downloadable!] (restricted)
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  18. Malerba, Franco & Orsenigo, Luigi, 1995. "Schumpeterian Patterns of Innovation," Cambridge Journal of Economics, Oxford University Press, vol. 19(1), pages 47-65, February.
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  20. Harhoff, Dietmar & Scherer, Frederic M. & Vopel, Katrin, 2003. "Citations, family size, opposition and the value of patent rights," Research Policy, Elsevier, vol. 32(8), pages 1343-1363, September. [Downloadable!] (restricted)
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  27. Olof Ejermo, 2005. "Technological Diversity and Jacobs' Externality Hypothesis Revisited," Growth and Change, Gatton College of Business and Economics, University of Kentucky, vol. 36(2), pages 167-195. [Downloadable!] (restricted)
    Other versions:
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This page was last updated on 2009-11-13.

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