International Networks of Knowledge Flows: An Econometric Analysis
The authors address the manifold nature of knowledge through the analysis of four distinct but complementary phenomena (Internet hyperlinks, European research networks, EPO co-patent applications, Erasmus students mobility) that characterize knowledge as an intrinsic relational structure (directly) connecting people, institutions and (indirectly) regions across five European countries.
Link
ftp://papers.econ.mpg.de/evo/discussionpapers/2005-19.pdf