The Geography of Knowledge Relatedness and Technological Diversification in U.S. Cities

David Rigby ()

No 1218, Papers in Evolutionary Economic Geography (PEEG) from Utrecht University, Department of Human Geography and Spatial Planning, Group Economic Geography

Abstract: U.S. patent data and patent citations are used to build a measure of knowledge relatedness between all pairs of 438 major patent classes in the USPTO. The knowledge relatedness measures, constructed as the probability that a patent in class j will cite a patent in class i, form the links of a patent network. Changes in this U.S. knowledge network are examined for the period 1975 to 2005. Combining the knowledge network with patent data for each of the CBSAs in the United States permits analysis of the evolution of the patent knowledge base within metropolitan areas. Measures of knowledge relatedness are employed to explain technological diversification and abandonment in U.S. cities.

Keywords: knowledge relatedness; technological diversification; patents; citations (search for similar items in EconPapers)
Pages: 33 pages
Date: 2012-10, Revised 2012-10
New Economics Papers: this item is included in nep-cse, nep-geo, nep-ino, nep-ipr, nep-pr~ and nep-ure
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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Persistent link: https://EconPapers.repec.org/RePEc:egu:wpaper:1218

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