RT Journal Article T1 On single-peakedness and strategy-proofness: ties between adjacent alternatives A1 Rodríguez Álvarez, Carmelo AB We extend the classical characterizations of social choice rules that satisfy strategy-proofness in the single-peaked domain of preferences by Moulin (Public Choice, 1980) and Barberà, Gul, and Stacchetti (Journal of Economic Theory, 1993) to multivalued social choice rules that admit either the selection of single alternatives or the selection of pairs of adjacent alternatives. PB Economics Bulletin SN 1545-2921 YR 2017 FD 2017 LK https://hdl.handle.net/20.500.14352/18852 UL https://hdl.handle.net/20.500.14352/18852 LA eng NO Ministerio de Economía y Competitividad (MINECO) DS Docta Complutense RD 8 abr 2025