Despite recent advances in reputation technologies, it is not clear how reputation systems can affect human cooperation in social networks. Although it is known that two of the major mechanisms in the evolution of cooperation are spatial selection and reputation-based reciprocity, theoretical...

The thesis answers several questions concerning how people behave in an economic context if behavioral norms and rules are not obvious. In particular, it is investigated how subjects behave if other people in the role of third parties are involved or if the subjects themselves have the role of...

Explaining human cooperation in large groups of non-kin is a major challenge to both rational choice theory and the theory of evolution. Recent research suggests that group cooperation can be explained by positing that cooperators can punish non-cooperators or cheaters. The experimental evidence...