Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/127090
Authors: 
Pramanik, Anup
Sen, Arunava
Year of Publication: 
2014
Series/Report no.: 
ISER Discussion Paper, Institute of Social and Economic Research, Osaka University 898
Abstract: 
In this paper we consider the exogenous indifference classes model of Barberá and Ehlers (2011) and Sato (2009) and analyze further the relationship between the structure of indifference classes across agents and dictatorship results. The key to our approach is the pairwise partition graph. We provide necessary conditions on these graphs for strategy-proofness and unanimity (or efficiency) to imply dictatorship. These conditions are not sufficient; we also provide separate stronger conditions that are sufficient. A full characterization is obtained in the case of two agents for domains where strategy-proofness and efficiency imply dictatorship.
Subjects: 
Social choice functions
Strategy-proofness
Dictatorial Domains
Exogenous Indifference Class
Gibbard- Satterthwaite theorem
JEL: 
D71
Document Type: 
Working Paper

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