cooperation is shaped by the way information about risk is presented (from description or from experience) and by differences in … lotteries with equivalent levels of risk. Cooperation rates in games vary with different levels of risk across decision … stochastic social dilemmas than in the lotteries. The findings highlight how an uncertain environment shapes cooperation and call …

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 …

find a large and positive effect of endogenous institutional choice on the level of cooperation in comparison to … exogenously implemented institutions. This suggests that participation rights enhance cooperation in groups. With endogenous … levels of cooperation. Our results are evaluated against the predictions of social preference models. -- public goods …

We study the stability of voluntary cooperation in response to varying rates at which a group grows. Using a laboratory … cooperation. We then study the effect on cooperation of exogenously varying rates of entry. Slow growth yields higher cooperation … endogenous growth generally also produces high cooperation levels, growth stalls at intermediate group sizes, leaving potential …

cooperation. The strongest increase is clearly evident when subjects interact with members of different identities, which is …

This paper provides a new way to identify conditional cooperation in a real-time version of the standard voluntary … behavior. Moreover, notwithstanding a decline in contributions, conditional cooperation is found to be stable over time …. -- Public goods game ; Real-time protocol ; Information feedback ; Conditional cooperation ; Simulations …

We test if cooperation is promoted by rank-order competition between groups in which all groups can be ranked first, i … are absent if groups perform at the same level and it therefore does not eliminate low-cooperation equilibria. We find … that all-can-win competition produces a universal increase in cooperation and benefits a majority of individuals if …

probability of coordination and discourage contributions. Introducing additional, less-efficient options does not alter … coordination and contributions relative to the benchmark …