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 …

In this paper we introduce a stochastic network formation model where agents choose both actions and links. Neighbors … in the network benefit from each other's action levels through local complementarities and there exists a global …

efficient network maximizing social welfare, and find that the efficient graph is either empty, complete or shows a strong core … counterfactual analyses, taking into account that the network and production can dynamically adjust to shocks or policy interventions ….6%. Our study further reveals that when ignoring the network structure the impact of firm exit or mergers is significantly …

neighbors in the social network. The same activities often exert externalities that cumulate in "stocks" affecting agents … network of social relations, as agents display strategic substitution with distance-two neighbors. We show that behavior is … behavior and key-players tend to move to the periphery of the network, and we discuss the effect of close-knit communities and …

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 provide a proposition that generalizes the results of these two models by stating that: (i) Strict Nash network … network as in Billand et al (2011). This proposition requires that a certain restriction on link formation cost (called …

the collaboration network researchers create spillovers not only to their direct coauthors but also to researchers …

We introduce a simple two-stage game of endogenous network formation and information sharing for reasoning about the … then we study how the network design and the utility specifications affect welfare. Surprisingly, we find that in general … "babblers" or "friends", irrespective of whether the network is unilateral or bilateral, in equilibrium, targeted information …

respect to their network position while their names do not matter. Existence of certain stable network structures is then … empty or complete network are always pairwise stable, stable symmetric networks exist, or stable networks with a connected … pairwise stable network is an NSG if utility is given by Bonacich centrality. …

This paper studies a noncooperative model of network formation. Built upon the two-way flow model of Bala and Goyal …