A Characterization of Consistent Collective Choice Rules
Article [Version publiée]
Fait partie deCahier de recherche ; #2006-12
Éditeur(s)Université de Montréal. Département de sciences économiques.
We characterize a class of collective choice rules such that collective preference relations are consistent. Consistency is a weakening of transitivity and a strengthening of acyclicity requiring that there be no cycles with at least one strict preference. The properties used in our characterization are unrestricted domain, strong Pareto, anonymity and neutrality. If there are at most as many individuals as there are alternatives, the axioms provide an alternative characterization of the Pareto rule. If there are more individuals than alternatives, however, further rules become available.