Why High Incentives Cause Repugnance: A Framed Field Experiment

Why are high monetary payments prohibited for certain goods, thereby causing shortages in their supply? I conduct (i) a framed field experiment with a general population sample, and (ii) a survey experiment with this sample and with ethics committees. In the experiment, participants can prohibit others from being offered money to register as stem-cell donors. I document that, whereas the majority of participants do not respond to changes in the incentives (63%) or become more in favour of the offer with higher incentives (20%), a minority of 17% prohibit high incentives. I show that this minority wants to protect individuals who are persuaded by high incentives. I also show that a lottery scheme reduces their objections to high incentives. Finally, I document that the public is much more supportive of high incentives than are ethics committees.