Efficient and Stable Collective Choices under Crowding Preferences
We consider a set of agents who have to choose one alternative among a finite set of social alternatives. A final allocation is a pair given by the selected alternative and the group of its users. Agents have crowding preferences over allocations: between any pair of allocations with the same alternative, they prefer the allocation with the largest number of users. We require that a decision be efficient and stable (which guarantees free participation in the group of users and free exit from it). We propose a two-stage sequential mechanism whose unique subgame perfect equilibrium outcome is an efficient and stable allocation which also satisfies a maximal participation property. The social choice function implemented by the proposed mechanism is also anonymous and group stable.
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- D. Berga & G. Bergantiños & J. Massó & A. Neme, 2006.
"On Exiting After Voting,"
International Journal of Game Theory,
Springer, vol. 34(1), pages 33-54, April.
- Berga, Dolors & Bergantiños, Gustavo & Massó, Jordi & Neme, Alejandro, 2003. "On Exiting after Voting," Working Papers of the Department of Economics, University of Girona 6, Department of Economics, University of Girona.
- M. Sanver, 2006. "Nash implementing non-monotonic social choice rules by awards," Economic Theory, Springer, vol. 28(2), pages 453-460, 06.
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