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I investigate complementarity games played on graphs, which model negative externalities embedded in structures of interaction. On the complete graph, the traditional economic analysis applies: the number of agents playing one strategy is proportional to its payoff. I show that, in general and...
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This paper brings a general network analysis to a wide class of economic games. A network, or interaction matrix, tells who directly interacts with whom. A major challenge is determining how network structure shapes overall outcomes. We have a striking result. Equilibrium conditions depend on a...
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We discuss social network analysis from the perspective of economics. We organize the presentation around the theme of externalities: the effects that one's behavior has on others' welfare. Externalities underlie the interdependencies that make networks interesting to social scientists. We...
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