We examine how conditional cooperation is related to the material payoffs in a Sequential Prisoner's Dilemma experiment … the material loss to the first-mover when the second-mover defects in response to cooperation. We find that few second …

We study how punishment influences conditional cooperation. We ask two questions: 1) how does conditional cooperation … change if a subject can be punished and 2) how does conditional cooperation change if a subject has the power to punish … cooperation. We find that the possibility of being punished increases the strength of conditional cooperation. At the same time …

identify individual punishment patterns and link them with individual cooperation patterns. Classifying N = 628 subjects along … these two dimensions documents that cooperation and punishment patterns are intuitively aligned for most individuals … engage in punishment. Analyzing the interplay between types in an additional experiment, we show that pro-social punishers …

We experimentally examine how incentives affect conditional cooperation (i.e., cooperating in response to cooperation … in some games and free ride in others. The rate of conditional cooperation is higher when the own gain from defecting is … others' payoffs, supporting the underlying role of social preferences in conditional cooperation. Our results suggest that …