Many economic transactions are prohibited—even in the absence of health or safety concerns or negative externalities—because of ethical concerns that cause these exchanges to be perceived as “repugnant” if conducted through a market. Establishing a system of payments for human organs is...

We conducted a randomized controlled trial involving nearly 700 customer-service representatives (CSRs) in a Canadian government service agency to study whether providing CSRs with performance feedback with or without peer comparison affected their subsequent organ donor registration rates....

We study out-group biases in attitudes toward refugees, and the effect of European Union (EU) immigration policies on these views, using an online survey experiment including 4,087 Italian participants. We assess attitudes using donations to a randomly assigned group: Italian victims of violence...

We conducted a large-scale field experiment in Granada, Spain, to assess the motivating effect on blood donation of matching each attempt to donate with a charitable contribution pledge for children in developing countries. The intervention involved 344 blood drives and 21,888 participants....

We present evidence from a natural field experiment involving nearly 100,000 individuals on the effects of offering economic incentives for blood donations. Subjects who were offered economic rewards to donate blood were more likely to donate, and more so the higher the value of the rewards....

We present evidence from nearly 14,000 American Red Cross blood drives and from a natural field experiment showing that economic incentives have a positive effect on blood donations without increasing the fraction of donors who are ineligible to donate. The effect increases with the incentive's...

Organizations and public agencies that promote pro-social activities constantly struggle to attract and encourage more contributions. In this article, we study the effects of an explicit reward in the context of blood donation. Specifically, we analyze the effects of a legislative provision that...

In many low- and middle-income countries blood donations per capita are substantially lower than in advanced economies. In these countries blood supply is mostly collected through directed donations from relatives and friends to individuals needing transfusions or to replace blood used in...

Many U.S. states have passed legislation providing leave to organ and bone marrow donors and/or tax benefits for live and deceased organ and bone marrow donations and to employers of donors. We exploit cross-state variation in the timing of such legislation to analyze its impact on organ...

A number of experimental studies have documented that financial rewards discourage the performance of altruistic activities because they conflict with intrinsic altruistic motivations. However, it is unclear whether this is evidence of a generalized aversion to rewards or, rather, an aversion to...