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...

Fairness preferences fundamentally affect individual behavior and play an important role in shaping social and political institutions. However, people differ both with respect to what they view as fair and with respect to how much weight they attach to fairness considerations. In this paper, we...