Condorcet consistency and pairwise justifiability under variable agendas

Abstract

We compare the consequences of imposing upon collective choice functions the classical requirement ofCondorcet consistency with those arising when requiring the functions to satisfy the principle of pairwise justi-fiability. We show that, despite the different logic underlying these two requirements, they are equivalent whenapplied to anonymous and neutral rules defined over a class of domains. The class contains the universal, thesingle-peaked, and that of order restriction, among other preference domains.