In this paper we test the celebrated `Strength of weak ties' theory of Granovetter (1973). We test two hypotheses on the network structure in a data set of collaborating economists. While we find support for the hypothesis of transitivity of strong ties, we reject the hypothesis that weak ties...

Der hier dokumentierte Workshop hatte sich zum Ziel gesetzt, einige Fälle von Zusammenarbeit auf regionaler Ebene und auf Unternehmensebene zwischen EU-Europa und den Beitrittsländern darzustellen und zu diskutieren. Dem Workshop liegt die Annahme zugrunde, dass innovationsorientierte...

We analyze the endogenous formation of R&D networks, where firms are active in different product markets and can benefit from R&D spillovers form collaborating firms within or across different industries. R&D spillovers help firms to introduce process innovations to lower their production costs....

We analyze the evolution of the international collaboration network in photovoltaic research. Using data on scientific publications for the period 1980-2015, we apply social network analysis to trace the evolution of the global network of countries and national research networks of...

We defined the concept of a common-knowledge network of authors in a research institution and used it to identify communities of authors using a new heuristic algorithm for clustering editing problem on weighted similarity measure networks. We analyzed dominant research topics based on most...