sensitive to warm glow (“impure altruism”) depends on her income level. While the presence of “warm glow” feelings would seem to …

volunteering time to donating money when monetary donations are, ceteris paribus, more efficient for providing resources to charity … allocation decisions. We define a measure of the price of impure altruism as the additional proportion of income sacrificed by a … predictions of the model we ran an experiment in which we varied within-subjects the costs and benefits of monetary and volunteer …

by this finding, I conduct an intertemporal donation experiment to closely investigate this moderation effect. I design … an experiment that mimics a telephone fundraiser and vary both the timing of the donation (immediate vs. delayed) and the …

(which they sometimes also create); and in charity and specific organizations. Altruism has various origins: it can be …

Ineffective fundraising lowers the resources charities can use for goods provision. We combine a field experiment and a … causal machine-learning approach to increase a charity's fundraising effectiveness. The approach optimally targets … fundraising to individuals whose expected donations exceed solicitation costs. Among past donors, optimal targeting substantially …

We test how donors respond to new information about a charity's effectiveness. Freedom from Hunger implemented a test … 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 …