This paper is a single-project meta-analysis of four experiments that model charitable giving as individual contributions to a multiplicity of competing threshold public goods. We pool 17,136 observations at the individual level to summarize the project and investigate the role of learning, gender, and risk attitude, since the included studies are inconclusive in this regard. We find that equally effective coordination devices are the existence of a single contribution option that stands out on its merits, learning, and delegation as long as the intermediary is formally obliged to pass along a high enough percentage of the transferred resources. Women delegate less than men, and consequently prefer direct contributions. Risk tolerance increases overall donations but decreases individual earnings. We discuss possible implications of our findings.