In the last decades substantive advance has been made in the measurement and understanding of frontier innovation in highly industrialized settings. However, little research focused on the process of learning and the introduction of novelties in smallholder farming of poor agricultural...

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...