Prior work has demonstrated that prosocial incentives - where individuals' effort benefits a charitable organization … - can be more effective than standard incentives, particularly when the stakes are low. Yet, little is known about the … effectiveness of prosocial incentives on people's decisions to participate or opt-in to the incentivized activity in the first place …

Little is known about how peers influence the impact of incentives. We investigate two mechanisms by which these … effects can occur: through peers' actions and peers' incentives. In a field experiment on snack choice in the school lunchroom … (choice of grapes versus cookies), we randomize who receives incentives, the fraction of peers incentivized, and whether or …

randomly assigned to one of three groups: one group received a standard mailing that emphasized the intrinsic incentives of the … the extrinsic incentives - either the financial rewards (Cash treatment) or the in-kind rewards (Support treatment). Our … results show that an emphasis on extrinsic incentives strongly affects who applies for the grant and consequently the type of …