Lin Zhou () (Department of Economics and Finance, City University of Hong Kong, Kowloon Tong, HONG KONG) Stephen Ching () (Department of Economics and Finance, City University of Hong Kong, Kowloon Tong, HONG KONG)
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In this paper we introduce a new definition of strategy-proofness for multi-valued social choice correspondences. We prove two Gibbard-Satterthwaite type results for strategy-proof social choice correspondences. These results show that allowing multiple outcomes as social choices will not necessarily lead to an escape from the Gibbard-Satterthwaite impossibility theorem.
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BARBERA, Salvador & BOSSERT, Walter & PATTANAIK, Prasanta K., 2001.
"Ranking Sets of Objects,"
Cahiers de recherche
2001-02, Universite de Montreal, Departement de sciences economiques.
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Barbera, S. & Bossert, W. & Pattanaik, P.K., 2001.
"Ranking Sets of Objects,"
Cahiers de recherche
2001-02, Centre interuniversitaire de recherche en économie quantitative, CIREQ.