This article presents a model of collective choice when group decisions must be justified by arguments from first principles. Individuals may have preferences over both the actions chosen and the arguments used to justify them. Defining a notion of stability in the arguments made and actions...

This article considers manipulation of collective choice — in such environments, a potential alternative is powerful only to the degree that its introduction can affect the collective decision. Using the Banks set (Banks, 1985), we present and characterize alternatives that can, and those...

In this article, I examine several models of voter behavior that are consistent with recent work in political psychology (Fiske and Tetlock, 1997) concerning incommensurability and individuals’ reluctance to make decisions involving explicit trade-offs between competing ideals or...

In this paper, we characterize equilibria in games of electoral competition between three or more office-seeking candidates. Recognizing that electoral equilibrium involves both candidates' and voters' strategies, we first prove existence of pure strategy electoral equilibria when candidates...