Two players bid for a dollar on the condition that both the loser and the winner must pay the bids, although only the winner will receive the dollar. Collusion or threats are excluded; bids must be in units of nickels; and a player does not bid in a situation in which bidding and not bidding would...

Crisis instability is the danger of war due to each side's fear that the other is about to attack. An index is defined to measure the degree of instability in a situation and is justified by a set of persuasive criteria that any such measure should satisfy, and also by a set of axioms based in...

The United Nations is under pressure to make the Security Council more representative of the membership. The formal literature on voting power has discovered much that can clarify this debate, and the present analysis gives a version of the Shapley-Shubik index of voting power that considers...

Donald Green and Ian Shapiro contend that rational choice models have made negligible contributions to the empirical study of politics. Published tests systematically violate some basic research principles, they say, and they ascribe the problem to modelers' universalist aim of explaining all...