Ostracism is practiced by virtually all societies around the world as a means of enforcing cooperation and excluding … contributors are excluded but also because high contributors sustain a higher cooperation level under the exclusion institution …

Pledges feature in international climate cooperation since the 2015 Paris Agreement. We explore how differences in … the Paris Agreement, can leverage the power of trustworthiness to enhance cooperation. …

norms on cooperation. We find that under the signaling mechanism, less cooperative players disguise themselves in the rule …-following game, but this does not decrease cooperation overall. More importantly, the signaling mechanism has a heterogeneous effect … on cooperation in rule-following and rule-breaking groups: It increases cooperation in rule-following groups but …