That is the title of the poster I'll be presenting this Saturday at the ASSA meetings in Philadelphia. We ran a prisoner's dilemma game in principles of economics classes and varied whether the students were paid for playing the game, or whether the game was hypothetical.
Below is a preview of our findings:
Overall, using games that employed monetary incentives lead to higher test scores, but not for students at all universities.The session is at 2:30 Saturday afternoon. Hope to see you there!