The paper develops a sociological approach for understanding the role of expectations in collective action. It argues that an approach based on expectations is better suited to explain collective action in episodes of social change than existing sociological theories. Two case studies - one on...

We experimentally investigate the nature of cooperation in various repeated games, with subjects from Romania and USA. We find stark cross-country differences in the propensity to sustain multilateral cooperation through bilateral rewards and punishments. U.S. groups perform well because...