This study provides the first comprehensive analysis of the distributional effects of Head Start, using the first national randomized experiment of the Head Start program (the Head Start Impact Study). We examine program effects on cognitive and non-cognitive outcomes and explore the...

In this paper, we assess whether welfare reform affects earnings only through mean impacts that are constant within but vary across subgroups. This is important because researchers interested in treatment effect heterogeneity typically restrict their attention to estimating mean impacts that are...

In this paper, we assess whether welfare reform affects earnings only through mean impacts that are constant within but vary across subgroups. This is important because researchers interested in treatment effect heterogeneity typically restrict their attention to estimating mean impacts that are...

Previous work using mostly self-reports shows large, positive effects of early-life exposure to Food Stamps on self-sufficiency, health, and well-being-lasting well into adulthood. We combine this same adoption timing with administrative data on earnings, employment, and use of disability...

We review the existing literature about the effects of the Medicaid program. We first describe the program's structure and how it has changed over time. We then discuss findings on coverage, crowd out, take-up and health. Finally, we look at effects of the program on non-health outcomes such as...