Per citar aquest document: http://ddd.uab.cat/record/45186
Free triples, large indifference classes and the majority rule
Barberà, Salvador, 1946-
Ehlers, Lars
Universitat Autònoma de Barcelona. Unitat de Fonaments de l'Anàlisi Econòmica
Universitat Autònoma de Barcelona. Institut d'Anàlisi Econòmica

Data: 2006
Descripció: 15 p.
Col·lecció: Working papers ; 512.02
Resum: We present a new domain of preferences under which the majority relation is always quasi-transitive and thus Condorcet winners always exist. We model situations where a set of individuals must choose one individual in the group. Agents are connected through some relationship that can be interpreted as expressing neighborhood, and which is formalized by a graph. Our restriction on preferences is as follows: each agent can freely rank his immediate neighbors, but then he is indifferent between each neighbor and all other agents that this neighbor "leads to". Hence, agents can be highly perceptive regarding their neighbors, while being insensitive to the differences between these and other agents which are further removed from them. We show quasi-transitivity of the majority relation when the graph expressing the neighborhood relation is a tree. We also discuss a further restriction allowing to extend the result for more general graphs. Finally, we compare the proposed restriction with others in the literature, to conclude that it is independent of any previously discussed domain restriction.
Drets: Aquest document està subjecte a una llicència d'ús de Creative Commons, amb la qual es permet copiar, distribuir i comunicar públicament l'obra sempre que se'n citin l'autor original, la universitat, la unitat i l'institut i no se'n faci cap ús comercial ni obra derivada, tal com queda estipulat en la llicència d'ús Creative Commons
Llengua: Anglès.
Document: workingPaper
Matèria: Elecció social ; Models matemàtics

Adreça alternativa: http://hdl.handle.net/2072/1937


15 p, 224.9 KB

El registre apareix a les col·leccions:
Documents de recerca > Working papers

 Registre creat el 2009-07-15, darrera modificació el 2016-06-11



   Favorit i Compartir