Nonprofit and Voluntary Sector Quarterly, Ahead of Print. A growing number of people donate to charity together with others, such as a spouse, friend, or stranger. Does giving to charity collectively with another person—called collaborative giving—promote generosity? Existing data offer unsatisfactory insight; most studies are correlational, present mixed findings, or examine other concepts. Yet, theory suggests that collaborative giving may increase generosity because giving with others could be intrinsically enjoyable. We conducted two well-powered, pre-registered experiments to test whether collaborative giving boosts generosity. In Experiment 1 (N = 202; 101 dyads) and Experiment 2 (N = 310; 155 dyads), pairs of unacquainted undergraduates earned money and were randomly assigned to donate collaboratively (Experiments 1–2), individually in each other’s presence (Experiments 1–2), or privately (Experiment 2). Across studies, we observed no condition differences on generosity. However, collaborative (vs. individual) giving predicted greater intrinsic enjoyment, which, in turn, predicted larger donations, suggesting a promising potential mechanism for future research and practice.

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