Characterizations of strategy-proof voting rules

1^st July 2020, 13:00 Microsoft Teams
Estelle Varloot
University of Liverpool

Abstract

We provide novel characterizations of strategy-proof voting rules when voters have uni-dimensional single-peaked preferences. The analysis links and unifies existing results in the literature such as Moulin's classic characterization in terms of phantom voters and Barbera, Gul and Stacchetti's in terms of winning coalitions (generalized median voter schemes). Moreover, we provide new characterizations of various special cases, combining strategy-proofness with other properties such as responsiveness, consistency, or proportionality.