Abstract
In a recent paper, Sato (Soc Choice Welf doi:10.1007/s00355-007-0285-5) has provided two alternative definitions of strategy-proofness for social choice correspondences and proved that they are incompatible with the joint requirements of anonymity, neutrality, and a minimal range condition. In this note, we use the results in Rodriguez-Alvarez (Soc Choice Welf 29:175–199, 2007) to directly prove stronger versions of Sato’s theorems.
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