In one-shot social dilemma experiments, cooperation rates dramatically increase if subjects are allowed to communicate before making a choice. There are two possible explanations for this 'communication effect'. One is that communication enhances group identity, the other is that communication elicits social norms. I discuss both views and argue in favor of a norm-based explanation.
CITATION STYLE
Bicchieri, C. (2002). Covenants without swords: Group identity, norms, and communication in social dilemmas. Rationality and Society. SAGE Publications Ltd. https://doi.org/10.1177/1043463102014002003
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