We study some recent developments and challenges in the empirics of the effects of social networks. We focus in …

friendship networks in the United States. We find that, for religious parents, the higher is the fraction of religious peers, the …

We survey the literature on social networks by putting together the economics, sociological and physics … network formation. While the physics/applied mathematics approach is capable of reproducing most observed networks, it does … not explain why they emerge. On the contrary, the economics approach is very precise in explaining why networks emerge but …

. What if networks rewire in response to changes in the economic environment, such as a randomized intervention? We exploit a …