We consider embedding independent within-group conflicts for the provision of public goods in a between-group competition for an exogenously determined prize as a structural mechanism for reducing free riding. We model this situation by a multi-level collective action game in which the group<92>s...</92>

Private incentives to invest in a public good are modeled as self- interested reciprocity where individuals use reputational scoring rules to determine their optimal level of investment. The model predicts that the disposition of any subject to cooperate is revealed by their first period...