Until recently the choice of methods to evaluate coalition theories has not been a serious problem because the vast majority of studies has been restricted to simple, three-person games. When larger groups are used to test various theories, a larger number of coalitions is possible and the...

Two studies investigated the effects of the perception of the opponent's motives and incentives to defect on cooperation in a mixed-motive game. Study I varied the perceived goal of the other (by instructions) and the incentive of the other to defect (by payoff values). Study II varied the...

Recent conflict studies that combine the behavioral decision-making approach with quantitative systems theory are yielding new insights and new verification methods in policy analysis. They can be characterized as "decision system" studies. The present study proposes and quantitatively verifies...

This paper develops a theory of how groups meet their members' demands. It is argued that the members of social units obtain satisfaction of their economic, cultural, and political needs through participation in social groups, including states or nations. It posits that changing environmental...