We use laboratory experiments with different salient rewards (monetary rewards versus extra credits) to study collective decision making behavior under different informational structures. The results show that even though subjects’ behavior follows a similar pattern in both cases, subjects tend to act more efficiently when they are compensated with extra credits rather than money.
Komai, Mana and Grossman, Philip, "Incentivizing Experiments: Monetary Rewards versus Extra Credits" (2006). Economics Faculty Working Papers. 9.