This paper proposes new centrality measures to characterise the 'key class', when agents in a network are sorted into … role-equivalent classes, such that its removal results in an optimal change in the network activity. The notion of role … theoretical applicability. Players in the network engage in a non-cooperative game with local payoff complementarities. We …

This paper provides a game-theoretic model of network formation with a continuous effort choice. Efforts are strategic … complements for direct neighbors in the network and display global substitution/congestion effects. We show that if the parameter … links according to a network cost function. Again all socially optimal configurations are such that the network is a nested …

I look at the equilibrium effects of homophily in network formation games having positive externalities. I show that … very weak preferences for network effects (such as preference for being part of a clique) may result in very high levels of … homophily at equilibrium. I present an empirical procedure that allows an evaluation of the role of network effects on the …

We study social learning in a social network setting where agents receive independent noisy signals about the truth … network does not privilege any agent in terms of influence, a large society almost always fails to converge to the truth. We …

We study social learning in a social network setting where agents receive independent noisy signals about the truth … network does not privilege any agent in terms of influence, a large society almost always fails to converge to the truth. We …

of the agreement form an information network. The network's members optimally specialize based on their opportunities in … particular aspects of the technology or in expanding or managing the network. Endogenously there are incentives to standardize on … designs and descriptions of the technology. A tinkerer in the network who sees an opportunity to produce a profitable product …