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 …

limited resources. We show that the dynamics and the associated phase structures critically depend on the underlying network …-growing random directed network admits a clear phrase transition from a stable or quot;criticalquot; state to a quot …;chaoticquot; state. In contrast, no such phrase transition has been detected in a growing directed network; Instead, it permits stable or …