What does global justice or charity requires us to give to other people? There is a large theoretical literature on this question. There is much less experimental work in political philosophy relevant to answering it. Perhaps for this reason, this literature has yet to have any major impact on theoretical discussions of global justice or charity. There is, however, some experimental research in behavioral economics that has helped to shape the field and a few relevant studies by political philosophers. This (...) paper reviews this research. Moreover, it argues that the little work that has been done can offer some methodological lessons to empirically engaged philosophers of many kinds. Finally, it suggests that there is reason for those interested in global ethics and charitable giving to consider doing new kinds of experimental and other empirical work in addition to traditional experimental philosophy. (shrink)