Social network analysis has transformed the study of organizations over the past 30 years. Rather than focus on individuals or teams, network scholars view the organization as a nexus of relationships. As its popularity increases, the scholarship is evolving in many directions including new...

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...