Scandinavian Working Papers in Economics
Papers in Innovation Studies,
Lund University, CIRCLE - Centre for Innovation Research
No 2007/8: Regional innovation measured by patent data – does quality matter?
Olof Ejermo ()
Additional contact information
Olof Ejermo: CIRCLE, Lund University, Postal: PO Box 117, Sölvegatan 16, SE-22100 Lund, Sweden
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.
Keywords: Regions; patents; patent quality; Sweden.
JEL-codes: O30
33 pages, December 1, 2007
Full text files
200708_Ejermo.pdf
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