Kelly, Jerry S.; Campbell, Donald E. - In: Economic Theory 20 (2002) 4, pp. 809-829
We characterize strategy-proof social choice procedures when choice sets need not be singletons. Sets are compared by leximin. For a strategy-proof rule g, there is a positive integer k such that either (i) the choice sets g(r) for all profiles r have the same cardinality k and there is an...