Why should you help a competitor? Why should you contribute to the public good if free
riders reap the benefits of your generosity? Cooperation in a competitive world is a …

Game theory is one of the key paradigms behind many scientific disciplines from biology to
behavioral sciences to economics. In its evolutionary form and especially when the …

Cooperation is key to prosperity in human societies. Population structure is well understood
as a catalyst for cooperation, where research has focused on pairwise interactions. But …

Evolution occurs in populations of reproducing individuals. The structure of a population can
affect which traits evolve,. Understanding evolutionary game dynamics in structured …

Understanding the mechanisms that can lead to the evolution of cooperation through natural
selection is a core problem in biology. Among the various attempts at constructing a theory …

We study evolutionary game dynamics in finite populations. We analyze an evolutionary
process, which we call pairwise comparison, for which we adopt the ubiquitous Fermi …

Are humans too generous? The discovery that subjects choose to incur costs to allocate
benefits to others in anonymous, one-shot economic games has posed an unsolved …

In many biological examples of cooperation, individuals that cooperate cannot benefit from
the resulting public good. This is especially clear in cases of self-destructive cooperation …

We review the theory of public goods in biology. In the N-person prisoner's dilemma, where
the public good is a linear function of the individual contributions, cooperation requires some …

In the animal world, collective action to shelter, protect and nourish requires the cooperation
of group members. Among humans, many situations require the cooperation of more than …