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A Theory of Endogenous Coalition Structures

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Working paper
Author/s: 
Debraj Ray and Rajiv Vohra
Issue number: 
1998.044
Publisher: 
FEEM
Year: 
1998
Consider an environment with widespread externalities, and suppose that binding agreements can be written. We study coalition for- mation in such a setting. Our analysis proceeds by de├śning on a partition function an extensive form bargaining game. We establish the existence of a stationary subgame perfect equilibrium for such a game. Our main results are concerned with the characterization of equilibrium coalition structures. We develop an algorithm that generates (under certain conditions) an equi- librium coalition structure. Our characterization results are especially sharp for symmetric partition functions. In particular, we provide a uniqueness theorem and apply our results to a Cournot oligopoly.
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