We consider statistical inference for regression when data are grouped into clusters, with regression model errors independent across clusters but correlated within clusters. Examples include data on individuals with clustering on village or region or other category such as industry, and...

This study examines the link between income and living arrangements. Our identification comes from exploiting a discontinuity in age in the benefit formula for the social pension in South Africa. In contrast to previous literature, we find no association between pension income and elderly...

We investigate the impact of welfare reform on health insurance coverage and healthcare utilization of single women aged 20–45, using nationally representative data from the Behavioral Risk Factor Surveillance System. We present estimates from both difference-in-difference models and...

Little is known about welfare reform’s effects on family structure and children’s living arrangements, an important focus for reformers. Using March CPS data, we find that state welfare waivers are associated with children being less likely to live with unmarried parents, more likely to live...