Since the seminal work of Becker, the dynamics of endogenous fertility has been based on the trade-off faced by parents between the quantity and the quality of their children. However, in developing countries, when child labor is an indispensable source of household income, parents actually...

We use estimates of parents' discount rate, inferred from their decisions to treat their children's body burdens of lead, to test empirically a model of transmission of cognitive skills from parents to children. The development of a child's cognitive skills depends in part upon the specific...