We conducted a field experiment with a charitable group to investigate whether giving the donor an option to write a …

and can improve individual and public welfare. This paper presents the results of a controlled experiment that was … experiment, and those who kept participating were less likely to pledge again. This, along with high attrition among nudged … selection effect of nudges, and discuss practical implications of our experiment in terms of the applicability of default …

effectiveness, whereas small prior donors decrease their giving. We motivate the analysis and experiment with a theoretical model … that highlights two predictions. First, larger gift amounts, holding education and income constant, is a proxy for altruism …). Second, those motivated by altruism will respond positively to appeals based on evidence, whereas those motivated by warm …

How do social media affect the success of charitable fundraising? We use individual-level longitudinal data and …'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 …

may attract more responsible employees. -- altruism ; conditional ; cooperation ; self-selection …

public goods experiment in which subjects were induced with the motives of Care and Anger through autobiographical recall …