goods provision embedded in a social context and find that in the absence of explicit norms externalities have almost no … effect. With an endogenously formed provision norm positive as well as negative externalities dampen provision as compared to … no externalities. We explain the surprisingly low provision under positive externalities by the providers' increased risk …

examines the nature of human behavior in a multilevel social dilemma game with positive provision externalities to local and … conditional cooperation prioritizing local level externalities. Our findings demonstrate how individuals adjust their behavior …