We provide a direct test of the role of social preferences and beliefs in voluntary cooperation and its decline. We elicit individuals cooperation preference in one experiment and use them as well as subjects elicited beliefs to make predictions about contributions to a public good played...

Psychological game theory can provide a rational choice explanation of framing effects; frames influence beliefs, and beliefs influence motivations. We explain this point theoretically, and explore its empirical relevance experimentally. In a 2×2-factorial framing design of one-shot public good...