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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- Dolors Berga & Gustavo Bergantiños & Jordi Massó & Alejandro Neme, 2003.
"On exiting after voting,"
Estudios de Economia,
University of Chile, Department of Economics, vol. 30(2 Year 20), pages 261-288, December.
- 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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