This article questions the slope homogeneity in a gravity equation and proposes a partially heterogeneous framework for its estimation using panel data. We suggest to employ K-mean clustering to group countries according to the gravity equation variables. Further, the gravity model is estimated...

This paper aims to find evidence for the positive impact of cluster structures on employment development in Germany. It develops a new way of measuring the co-location of suppliers and buyers of intermediate goods in a region as well as the importance for the employment development in individual...

Kurt A. Hafner, Bayerisches Staatsinstitut für Hochschulforschung und Hochschulplanung, München, stellt die Ergebnisse einer im Auftrag der Europäischen Kommission durchgeführten Studie zu Firmenclustern und Innovationstätigkeit deutscher Unternehmen vor. Die Studie zeigt, dass der...