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Equal division among the few: an experiment about a coalition formation game

Abstract : We study experimentally a three player sequential and symmetric coalition formation game with empty core. In each round a randomly chosen proposer must choose between a two players coalition or a three players coalition and decide about the payoff division among the coalition members. Players who receive a proposition can accept or reject it. In case of acceptance the game ends. If it is rejected, a new proposer is randomly selected. The game was played repeatedly, with randomly rematched groups. We observe that over 86% of the realized coalitions are two-players coalitions. Three players coalitions are often observed in early rounds but are frequently rejected. Equal splits are the most frequently observed divisions among coalition members, and their frequency increases sharply over time. We propose an extension of von Neumann and Morgenstern (1944)'s notion of stable set to account for our results.
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Preprints, Working Papers, ...
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https://hal.inrae.fr/hal-03227388
Contributor : Laurent Garnier <>
Submitted on : Monday, May 17, 2021 - 11:40:02 AM
Last modification on : Tuesday, June 1, 2021 - 2:38:57 PM

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Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

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  • HAL Id : hal-03227388, version 1

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Yukihiko Funaki, Emmanuel Sol, Marc Willinger. Equal division among the few: an experiment about a coalition formation game. 2021. ⟨hal-03227388⟩

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