This paper reports an experimental investigation of a trust game using either cash or class credit as incentives to participants. We recruit from two auditorium classes. In one class, each token has cash value; in the other, each token is worth extra-credit points added to the students’ overall...

We use the strategy method to classify subjects into cooperator types in a large-scale online Public Goods Game and find that free riders spend more time on making their decisions than conditional cooperators and other cooperator types. This result is robust to reversing the framing of the game...