This paper describes the pattern of reductions in mortality across Brazilian municipalities between 1970 and 2000, and analyzes its causes and consequences. It shows that, as in the international context, the relationship between income and life expectancy has shifted consistently in the recent...

This paper investigates how material well-being has changed over time for those at the bottom of the distributions of income and consumption. We document the sharp differences between recent trends in measured income and consumption, focusing on families headed by a single mother. Since the...

We study the effect of welfare reform, broadly defined to include social policy changes in the 1990s, on the material well-being and expenditure patterns of poor single-mother families. Our research suggests that welfare reform did not affect total expenditures in households headed by...

This paper concerns the problem of allocating a binary treatment among a target population based on observed covariates. The goal is to (i) maximize the mean social welfare arising from an eventual outcome distribution, when a budget constraint limits what fraction of the population can be...

The regression discontinuity (RD) data design is a quasi-experimental design with the defining characteristic that the probability of receiving treatment changes discontinuously as a function of one or more individual characteristics. This data design occasionally arises in economic and other...

We conducted a unique randomized experiment to estimate the impact of alternative cash transfer delivery mechanisms on household demand for routine preventative health services in rural Burkina Faso. The two-year pilot program randomly distributed cash transfers that were either conditional or...