In this experiment, we test whether subjects' responses to variations in the action set in a dictator game depends on induced group identities. The action set includes choices in which the dictator can either give money to or take money from the other player. As an extension to the anonymous setting, we introduce induced group identities using the minimal group paradigm. Based on a dictator game conducted with more than 300 students in Indonesia, we implement a full factorial design in order to analyze the framing of the action set in a varied cultural context and to examine varied prevalence of social norms given a group identity context. If group identity is not salient, we find that participants are slightly more generous when they have an opportunity to give to rather than to take from the recipient. However, when participants are matched with in-group members, this result is reversed and highly significant. The result of differing responses to framing effects in within-group interactions compared to a neutral setting are largely ascribed to the varied compliance with existing social norms.1 Closely related to [4], List [5] investigates give and take options in a dictator game. However, the results are not covered here, as the choice set is not isomorphically.
We test whether and, if so, how incentives to promote pro-social behavior affect the extent to which it spills over to subsequent charitable giving. To do so, we conduct a two-period artefactual field experiment to study repeated donation decisions of more than 700 participants. We vary how participants' first pro-social behavior is incentivized by a wide range of fundraising interventions ranging from soft to hard paternalism. Our design allows us to decompose spillover effects into a pure spillover effect, which identifies the impact of previous pro-social behavior on subsequent donation decisions and a crowding effect, which captures the extent to which the spillover effects are affected by the incentives exerted on the previous pro-social behavior. We find evidence for negative spillover effects. Participants donate less if they completed a pro-social task prior to the donation decision. Most importantly, we find that the spillover effects depend on how the initial pro-social behavior has been incentivized. Especially participants who are incentivized to donate through social comparisons are more willing to give to charity thereafter compared to participants whose initial prosocial behavior is incentivized by monetary rewards. The variations in spillover effects are driven by participants' perceived external pressure in the first pro-social decision.
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