Les Cahiers de Recherche - HEC Paris
Factoring out the impossibility of logical aggregation
Abstract: According to a theorem recently proved in the theory of
logical aggregation, any nonconstant social judgment function that
satisfies independence of irrelevant alternatives (IIA) is dictatorial. The
author shows that the strong and not very plausible IIA condition can be
replaced with a minimal independence assumption plus a Pareto-like
condition. This new version of the impossibility theorem likens it to
Arrow's and arguably enhances its paradoxical value.
Keywords: logical aggregation; (follow links to similar papers)
17 pages, October 1, 2006
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