When subjects interact in continuous time, their ability to cooperate may dramatically increase. In an experiment, we study the impact of different time horizons on cooperation in (quasi) continuous time prisoner's dilemmas. We find that cooperation levels are similar or higher when the horizon...

While there is an extensive literature on the theory of infinitely repeated games, empirical evidence on how the shadow of the future affects behavior is scarce and inconclusive. I simulate infinitely repeated prisoner's dilemma games in the lab with a random continuation rule. The experimental...

Case studies of cartels and recent theory suggest that repeated communication is key for stable cooperation in environments where signals about others' actions are noisy. However, empirically the exact role of communication is not well understood. We study cooperation under different monitoring...

We propose a model of coupled population games where intra- and intergroup interactions overlap. We analyze the general class of symmetric 2x2 games with coupled replicator dynamics. Standard one- and two-population predictions extend to a total of ten regions with different sets of attractors,...

This paper presents the empirical phase diagram showing the cooperation phase, the mixed phase and the defection phase of prisoner's dilemma experiment. The empirical data includes 21 experiments using a total of 350 human subjects. Experimental parameters are the possibility of continuation...

Case studies of cartels and recent theory suggest that communication promotes cooperation under imperfect monitoring, where actions can only be observed with noise. We report the results of a laboratory experiment designed to answer the question how much communication is needed to sustain...

This paper uses a laboratory experiment to study the effect of a monitoring structure on the play of the infinitely repeated prisoner's dilemma. Keeping the stage game fixed, we examine the behavior of subjects when information about past actions is perfect (perfect monitoring), noisy but public...

Reanalyzing 12 experiments on the repeated prisoner's dilemma (PD), we robustly observe three distinct subject types: defectors, cautious cooperators and strong cooperators. The strategies used by these types are surprisingly stable across experiments and uncorrelated with treatment parameters,...

Reanalyzing 12 experiments on the repeated prisoner's dilemma (PD), we robustly observe three distinct subject types: defectors, cautious cooperators and strong cooperators. The strategies used by these types are surprisingly stable across experiments and uncorrelated with treatment parameters,...

This paper uses a laboratory experiment to study beliefs and their relationship to action and strategy choices in finitely and indefinitely repeated prisoners' dilemma games. We find subjects' beliefs about the other player's action are accurate despite some systematic deviations corresponding...