Strategy-proofness on restricted separable domains |
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Authors: | Ricardo Martínez Bernardo Moreno |
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Institution: | 1. Departmento de Economía, Universidad Carlos III de Madrid, c/ Madrid, 126, 28903?, Getafe, Madrid, Spain 2. Departmento de Teoría Económica, Universidad de Málaga, 29013?, Malaga, Spain
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Abstract: | We study a problem in which a group of voters must decide which candidates are elected from a set of alternatives. The voters’ preferences on the combinations of elected candidates are represented by linear orderings. We propose a family of restrictions of the domain of separable preferences. These subdomains are generated from a partition that identifies the friends, enemies and unbiased candidates for each voter. We characterize the family of social choice functions that satisfy strategy-proofness and tops-onlyness properties on each of the subdomains. We find that these domain restrictions are not accompanied by an increase in the family of social choice functions satisfying the two properties. |
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