Commitment and conflict in unanimity bargaining

Topi Miettinen, Christoph Vanberg

We theoretically investigate how the application of unanimity rule can lead to inefficient delay in collective decision making. We do so in the context of a distributive multilateral bargaining model featuring strategic pre-commitment. Prior to each bargaining round, players can declare a minimum share that they must receive in return for their vote. Such declarations become binding with an exogenously given probability. We characterize the set of stationary subgame perfect equilibria under all q-majority rules. Our results suggest that unanimity rule is uniquely inefficient. All other rules, including all-but-one, are fully efficient.

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Year of publication:	25 Jun. 2024
Authors:	Miettinen, Topi ; Vanberg, Christoph
Publisher:	Heidelberg : Heidelberg University, Department of Economics
Subject:	bargaining \| commitment \| conflict \| delay \| international negotiations \| climate negotiations \| legislative \| multilateral \| voting \| majority \| unanimity \| Verhandlungstheorie \| Bargaining theory \| Verhandlungen \| Negotiations \| Abstimmungsregel \| Voting rule \| Konflikt \| Conflict \| Internationale Umweltpolitik \| International environmental policy