Articles

Majority Vote Following a debate

I. GILBOA, N. VIEILLE

Social Choice and Welfare

août 2004, vol. 23, n°1, pp.115-126

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)


Voters determine their preferences over alternatives based on cases (or arguments) that are raised in the public debate. Each voter is characterized by a matrix, measuring how much support each case lends to each alternative, and her ranking is additive in cases. We show that the majority vote in such a society can be any function from sets of cases to binary relations over alternatives. A similar result holds for voting with quota in the case of two alternatives


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