'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 …

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. …

donation of others, it is unclear how fundraisers should take advantage of this. In this paper we conduct a field experiment in …

In a fundraising field experiment we show that individuals are not only conditionally cooperative, but that they are … looking) high status person. In our experiment the probability to receive a donation in a train is 65% higher in the low …

would therefore expect that charitable organizations could benefit from peer-to-peer fundraising if they were able to … investigate this by implementing a field experiment embedded in an online giving organization's web page. In our experiment … or via a private message is different. (4) There are benefits to incentivizing peer-to-peer fundraising in increased new …

donation of others, it is unclear how fundraisers should take advantage of this. In this paper we conduct a field experiment in …

they are an “average altruism type” relative to their audience. Our findings suggest caution in using public observation to …

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 …

Results are reported of the first natural field experiment on the dictator game, where subjects are unaware that they … participate in an experiment. In contrast to predictions of the standard economic model, dictators show a large degree of pro … participate in an experiment or not. …