Understanding the proximate and ultimate sources of human cooperation is a fundamental
issue in all behavioural sciences. In this paper, we review the experimental evidence on …

Although largely unaddressed by evolutionary theory for more than a century after Darwin,
over the last decade a wide range of adaptationist, byproduct, and memetic explanations …

A critical question facing experimental economists is whether behavior inside the laboratory
is a good indicator of behavior outside the laboratory. To address that question, we build a …

We review the experimental evidence on risk aversion in controlled laboratory settings. We
review the strengths and weaknesses of alternative elicitation procedures, the strengths and …

A number of experimental studies have shown that the opportunity to punish anti-social
behavior increases cooperation levels when agents face a social dilemma. Using a public …

A key aspect of human behaviour is cooperation,,,,,,. We tend to help others even if costs are
involved. We are more likely to help when the costs are small and the benefits for the other …

We analyse an experimental public goods game in which group members can
endogenously determine whether they want to supplement a standard voluntary contribution …

A novel experiment is used to show that the effect of a policy on the level of cooperation is
greater when it is chosen democratically by the subjects than when it is exogenously …

Human cooperation in social dilemmas challenges researchers from various disciplines.
Here we combine advances in experimental economics and evolutionary biology that …

Individuals sort into and out of economic environments based on their preferences and in
response to relative prices. We demonstrate the importance of such sorting for the …