Voter Antagonism and the Paradox of Voting

Abstract

The purpose of this paper is to give a systematic account of the significance that antagonism among opinions of individuals has on the theory of social choice. We define an intensity of antagonism among individuals and an index of possibility of constructing social welfare functions, and show that when there is less antagonism in a society, then there is more possibility of constructing social welfare functions. Since antagonism is an opposite concept to similarity, this relation can be viewed as a formal realization of Arrow's assertion [1, Ch. 7] that sets preference similarity as the basis of social welfare judgement.

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