ranging stakes averaging over $20,000. Cooperation is surprisingly high for amounts that would normally be considered … cooperation in our sample. That is, players do not seem to be more likely to cooperate if their opponent might be expected to …

random from the neighbors of the punished agent. It is found that the promotion of cooperation is attributed to the entangled … extensive numerical simulations. Our results to some extent reflect the underlying mechanism promoting cooperation. …

its rival’s willingness to cooperate. We study the prospects for cooperation given the need for the firm to learn the … environment and its rival’s output. We show how profit and cooperation rates are affected by the sizes of both firms, their … willingness to cooperate, and by environmental complexity. In addition, we investigate equilibrium firm size and cooperation rates. …

, the less likely cooperation will be. …

cooperate when either one of these mechanisms is allowed. In agreement with theory, subjects aiming for cooperation choose …We consider the possibility that cooperation in a prisoner's dilemma is fostered by people's voluntarily enhancement of … higher vulnerability levels in Gradual than in Leap, which maps into higher mutual cooperation levels. …

to play the prisoner's dilemma game enhances cooperation, (iii) if the payoff for simultaneous defection is negative …

even enhance the effect of cooperation. …

behavior. I show that for a large class of parameters cooperation will emerge if the population is large; if the population is … population, the less likely cooperation will be. <BR><BR> …