experiment randomly assigning participants to four raffle treatments to examine the effectiveness of alternative incentive … revenue gains are available on both margins. Our experiment, and others like it, illustrates the power of field experiments to … inform fundraising choices. …

field experiment that compares the principal-first and agent-first orderings to each other and a gift-less control …

's contacts. However, results from a field experiment where broadcasting of the initial pledges was randomized suggest that the … observational findings were likely due to homophily rather than genuine social contagion effects. The experiment also shows that … (30 out of 6.4 million users reached) were made. Finally, an online survey experiment showed that both the presence of an …

We design a new field experiment to test pro-social behaviour: will a household return a letter that has been …

display no difference in rationality from population averages and there is evidence of altruism among participants. We provide …

We investigate the determinants of giving in a lab-in-the-field experiment with large stakes. Study participants in … that must be in cash. Qualitative post-experiment responses suggest that this effect is driven by a desire to control how …

We present evidence from a natural field experiment designed to shed light on the efficacy of fundraising schemes in … fundraising ; natural field experiment … opera attendees a letter describing a charitable fundraising project organized by the opera house. Recipients were randomly …

We examine optimal incentives for charitable giving with a large-scale field experiment involving 26 charities and over … policy to evaluate effectiveness. The best-guess incentives in our initial field experiment turned out to be ineffective at …