Technological and geographical proximity effects on knowledge spillovers: evidence from us patent citations
AbstractThe purpose of this paper is to investigate the pattern of knowledge flows as indicated by patent citations. In order to compute the technological proximity, we have followed the methodology developed by Jaffe (1986), where a technological vector is based on the distribution of patents of each firm across technology classes. As far as the geographic proximity is concerned, we have used the latitude and the longitude coordinates of the city in which each firm is located. The empirical results suggest that the effects of proximity variables on knowledge flows are rather differentiated.
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Bibliographic InfoPaper provided by ULB -- Universite Libre de Bruxelles in its series DULBEA Working Papers with number 08-18.RS.
Date of creation: Sep 2008
Date of revision:
Publication status: Published by: ULB, DULBEA
Innovation; Knowledge Spillovers; Technology Transfer; Patent Citations.;
This paper has been announced in the following NEP Reports:
- NEP-ALL-2008-09-20 (All new papers)
- NEP-CSE-2008-09-20 (Economics of Strategic Management)
- NEP-GEO-2008-09-20 (Economic Geography)
- NEP-INO-2008-09-20 (Innovation)
- NEP-IPR-2008-09-20 (Intellectual Property Rights)
- NEP-KNM-2008-09-20 (Knowledge Management & Knowledge Economy)
- NEP-TID-2008-09-20 (Technology & Industrial Dynamics)
- NEP-URE-2008-09-20 (Urban & Real Estate Economics)
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