Internal migration has the potential to substantially increase income, especially for the poor in developing countries, and yet migration rates remain low. We explore the role of psychic costs by evaluating the impacts of internal migration on a suite of well-being indicators using a unique,...

Altruism among family members can, in some cases, inhibit cooperation by increasing the utility that players expect to receive in a non-cooperative equilibrium. To test this, we examine agricultural productivity in polygynous households in West Africa. We find that cooperation is greater -...