Carpenter and Matthews (2009) examine the cooperation norms determining people's punishment behavior in a social … norms ; voluntary cooperation …

Cooperation problems are at the heart of many everyday situations. In this paper, we propose a very simple and light …-handed mechanism to sustain cooperation and test its performance in a rich laboratory environment. The mechanism moderates cooperation … in natural settings. -- Public Good ; Behavioral Uncertainty ; Conditional Cooperation ; Information ; First Impressions …

, and explains the degree of cooperation by a combination of five motives: the size of gains from cooperation, expectations …

is able to sustain cooperation in groups even when it is observed only in the end of the interaction sequence. Our …. Providing both unobserved and observed punishment strongly enhances cooperation within groups - strikingly, even with less …

externality. A within-subjects measure of reticence to impose harm does not explain cooperation. But the externality makes … participants more pessimistic. However conditional on their beliefs participants are more, not less cooperative if cooperation …

. Akerlof and Rachel E. Kranton, 2000), we show theoretically that introspection may enhance cooperation by increasing the …) expectations. Our results show that introspection causally increases cooperation. Both home-grown idealism and the experiences with …