Social Choice traditionally employs the preferences of voters or agents as primitives. However, in most situations of constitutional decision-making the beliefs of the members of the electorate determine their secondary preferences or choices. Key choices in US political history, such as the...

Previous analyses have shown that if a point is to be a core of a majority-rul e voting game in Euclidean space when preferences are smooth, then the utility gradients at the point must satisfy certain restrictive symmetry conditions. In this paper, these results are generalized t o the case of...

In the model presented here, $n$ parties choose policy positions in a space $Z$ of dimension at least two. Each party has true preferences on $Z$ that are unknown to other agents. In the first version of the model considered the party declarations determine the lottery outcome of coalition...