A Graphical Analysis of Some Basic Results in Social Choice
We use a simple graphical approach to represent Social Welfare Functions that satisfy Independence of Irrelevant Alternatives and Anonymity. This approach allows us to provide simple and illustrative proofs of May's Theorem, of variants of classic impossibility results, and of a recent result on the robustness of Majority Rule due to Maskin (1995). In each case, geometry provides new insights on the working and interplay of the axioms, and suggests new results including a new characterization of the entire class of Majority Rule SWFs, a strengthening of May's Theorem, and a new version of Maskin's Theorem.
|Date of creation:||Mar 2001|
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Research Papers by the Institute of Economics and Econometrics, Geneva School of Economics and Management, University of Geneva
95.01, Institut d'Economie et Econométrie, Université de Genève.
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