Reputation and reciprocity are key mechanisms for cooperation in human societies, often
going hand in hand to favor prosocial behavior over selfish actions. Here we review recent …

This chapter reviews research on the group identity explanation of social influence,
grounded in self-categorization theory, and contrasts it with other group-based explanations …

Problems of cooperation--in which agents seek ways to jointly improve their welfare--are
ubiquitous and important. They can be found at scales ranging from our daily routines--such …

We live and cooperate in networks. However, links in networks only allow for pairwise
interactions, thus making the framework suitable for dyadic games, but not for games that …

Experimental games model situations in which the future outcomes of individuals and
groups depend on their own choices and on those of other (groups of) individuals. Games …

Poor research design and data analysis encourage false-positive findings. Such poor
methods persist despite perennial calls for improvement, suggesting that they result from …

It has long been assumed that social animals, such as humans, are born with a brain system
that has evolved to support social affiliation. However, the evidence does not necessarily …

Across societies, humans punish norm violations. To date, research on the antecedents and
consequences of punishment has largely relied upon agent-based modeling and laboratory …

People must integrate disparate sources of information when making decisions, especially
in social contexts. But information does not always flow freely. It can be constrained by social …

Does cooperating require the inhibition of selfish urges? Or does “rational” self-interest
constrain cooperative impulses? I investigated the role of intuition and deliberation in …