sustaining cooperative behavior but highlight an intrinsic free-rider problem: the fitness benefits of negative reciprocity are …A preference for negative reciprocity is an important part of the human emotional repertoire. We model its role in … reciprocity is a meme consisting of a group norm together with low-powered (and low-cost) group enforcement of the norm. The main …

In this paper we argue that authorities aid cooperation by means of direct coordination or the enforcement of pre …

norms. In recent years, there has been substantial progress, however, on how cooperation norms are enforced. Here we review …. Moreover, the explicit study of sanctioning behavior provides instruments for measuring social norms and has also led to deeper … insights into the proximate and ultimate forces behind human cooperation. …

the relative importance of intentions and incentives in producing non-cooperative behavior in a personal exchange …-based motivations and increases the likelihood of income-maximizing behavior. …

training reverse that effect and promote cooperation? We conducted an experiment to answer this question. We found that … students who had the ethics module had higher rates of cooperation than students without the ethics module, even after … controlling for communication and other factors expected to affect cooperation. We conclude that the teaching of ethics can …

- replication, evolution, adaptation, self-organization, exploitation, competition, cooperation, and social network formation. Alife …