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 …

social networks. We find that, depending on how strong peer pressures are, non-whites choose to adopt "oppositional …

networks. We then analyze a policy that consists of finding and getting rid of the key player, that is, the criminal who, once …

This paper studies whether structural properties of friendship networks affect individual outcomes in education and … networks, we show that, after controlling for observable individual characteristics and unobservable network specific factors …