Biographical note: GoyalSanjeev: Sanjeev Goyal is professor of economics at the University of Cambridge and a fellow of Christ’s College. He is one of the pioneers in the economic study of networks, and his work has appeared in leading international journals such as "Econometrica, Journal of...

Abstract A firm wishes to inform a community of individuals about its product. Information travels within the community because of the social interactions between individuals. We establish that social interactions appear in a firm's payoff as a network multiplier, which is increasing both in the...

Abstract The aim of the special issue is to explore open problems at the frontier of the Economics of Social Networks. The papers in this special issue range across pure and applied theory and empirical investigations, and in this they reflect the richness of on-going research in the economics...

This paper examines the celebrated “strength of weak ties” theory of Granovetter (1973). We examine two hypotheses implied by the theory: one, for any three players with two links present, the probability of a third link being present is increasing in the strength of the two ties, and two, the...