Epstein (1998) demonstrates that in the demographic Prisoner's Dilemma game it is possible to sustain cooperation in a … sustained cooperation in a one-dimensional version of the model. Defectors are forced out of cooperation zones due to a …

In this paper we take up a model of Okada (1996) to describe the possibility of collective cooperation in a n …

, the less likely cooperation will be. …

We find that contrary to common perception, cooperation as equilibrium of the infinitely repeated discounted prisoner …-discount factor parameter space cooperation equilibria are strictly risk dominated by non-cooperation (according to the Harsanyi …

, and explains the degree of cooperation by a combination of five motives: the size of gains from cooperation, expectations …

externality. A within-subjects measure of reticence to impose harm does not explain cooperation. But the externality makes … participants more pessimistic. However conditional on their beliefs participants are more, not less cooperative if cooperation …

cooperative task. The data show that clerical workers differ from college students in overall cooperation rates, strategy adoption … and use of punishment opportunities. Students cooperate more than workers. Cooperation increases in both subject pools … defection, and more likely to select strategies of conditional cooperation. Finally, students are more likely than workers to …

cooperation is shaped by the way information about risk is presented (from description or from experience) and by differences in … lotteries with equivalent levels of risk. Cooperation rates in games vary with different levels of risk across decision … stochastic social dilemmas than in the lotteries. The findings highlight how an uncertain environment shapes cooperation and call …