generosity with a sequence of dictator games conducted in the field. We find that networks of different dimensions differ … substantially in density, clustering, and centrality. When relating generosity to networks we observe that social distance only …

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 …