Technological and geographical proximity effects on knowledge spillovers:evidence from us patent citations

Luigi Aldieri ()

No 08-18.RS, Working Papers DULBEA from Université libre de Bruxelles, Department of Applied Economics (DULBEA)

Abstract: The 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.

Keywords: Innovation; Knowledge Spillovers; Technology Transfer; Patent Citations. (search for similar items in EconPapers)
JEL-codes: F1 F2 O3 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-cse, nep-geo, nep-ino, nep-ipr, nep-knm, nep-tid and nep-ure
Date: 2008-09
View citations in EconPapers

Downloads: (external link)
http://dev.ulb.ac.be/dulbea/documents/1257.pdf (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: http://EconPapers.repec.org/RePEc:dul:wpaper:08-18rs

Access Statistics for this paper

More papers in Working Papers DULBEA from Université libre de Bruxelles, Department of Applied Economics (DULBEA)
Contact information at EDIRC.
Series data maintained by Pierre-Guillaume Méon ().