-emptiness of the strong core and the second domain restriction ensures non-emptiness of the weak core of the corresponding hedonic … games.Moreover, an element of the strong core under friends appreciation can be found in polynomial time, while finding an … element of the weak core under enemies aversion is NP-hard.We examine also the relationship between our domain restrictions …

Networks and Farsighted Stability By Frank H. Page, Jr. Department of Finance University of Alabama Tuscaloosa, AL … (1994), can be applied to directed networks. In particular, we introduce the notion of a supernetwork. A supernetwork is … made up of a collection of directed networks (the nodes) and uniquely represents (via the arcs connecting the nodes) agent …

We provide an overview on networks in economics. We first look at the theoretical aspects of network economics using a … game-theoretical approach. We derive some results on games on networks and network formation. We also study what happens … empirical-relevant questions by mainly focusing on labor-market networks and crime networks. We provide some empirical evidence …

We study the structure of pairwise stable networks from a very general point. Rather than assuming a particular … empty or complete network are always pairwise stable, stable symmetric networks exist, or stable networks with a connected … networks: they are nested split graphs (NSG). We illustrate these results with many examples from the literature, including …

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 …

determines the structures of networks. In our model, agents are endowed with their own multidimensional characteristics and their … stable networks, and analyze how they are related to the way agents measure social distances. The model predicts the small …-formation costs, the model also accommodates other well documented empirical patterns of social networks such as skewed degree …

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 …