In this article we test for dynamic inter- and intra-industry externalities on the urban level in the Netherlands. We argue that previous contributions might be sensitive to untested spatial and sectoral composition effects of urban data. We conclude that research results are better controlled...

Collaboration and the exchange of knowledge are supposedly made easier by geographical proximity because of the tacit character of knowledge. Recently a number of scholars' criticised this view on geographical proximity as being oversimplified and argued that the precise role of geographical...

This study shows for eight science-based industries that the citation impact of research collaboration is higher for international collaboration than for national and regional collaboration. A further analysis of institutional affiliations shows that university-industry-government collaborations...