Why do people in rich countries not transfer more of their income to people in the world's poorest countries? To study this question and the relative importance of needs, entitlements, and nationality in people's social preferences, we conducted a real effort fairness experiment where people in...

The standard economic approach to tax policy has to a large extent relied on welfarist theories of justice, in particular the utilitarian view that the government should try to maximize the sum of individual welfare. This welfarist framework has proved a productive point of departure for much...