Toward Applicable Social Choice Theory: A Comparison of Social Choice Functions under Spatial Model Assumptions

Abstract

This article develops a formal framework to aid political designers in the comparison of social choice functions. It generalizes earlier assumptions of @‘impartial culture@’ so that we may begin to investigate the effect of politically interesting variations on the probability that different social choice functions will satisfy given performance criteria. As an application of the framework, a detailed Monte Carlo study compares the ability of four different social choice functions to select a Condorcet winner when voter preference orders have been generated from a spatial representation of ideal points and alternatives. We also investigate the potential of alternative methods of selecting winners in presidential primary elections.