Does Canada's publicly funded, single payer health care system deliver better health outcomes and distribute health resources more equitably than the multi-payer heavily private U.S. system? We show that the efficacy of health care systems cannot be usefully evaluated by comparisons of infant...

How responsive to health shocks are healthcare systems in the developing world? Developing countries are known to have both lower levels of hospital infrastructure and serious health shocks driven by air pollution. These shocks are transitory and may be marginal relative to other health demands,...

Whether immigrants advance in labor markets relative to natives as they gain experience is a fundamental question in the economics of immigration. For the US, it has been difficult to answer this question for the period when the immigration rate was at its historical peak, between the 1840s and...

The national origin of an individual's human capital is a crucial determinant of its value. Education acquired abroad is significantly less valued than education obtained domestically. This difference can fully explain the earnings disadvantage of immigrants relative to comparable natives in...

We compile large datasets from Norwegian and US historical censuses to study return migration during the Age of Mass Migration (1850-1913). Return migrants were somewhat negatively selected from the migrant pool: Norwegian immigrants who returned to Norway held slightly lower-paid occupations...

During the Age of Mass Migration (1850-1913), the US maintained an open border, absorbing 30 million European immigrants. Prior cross-sectional work on this era finds that immigrants initially held lower-paid occupations than natives but experienced rapid convergence over time. In...

Lead poisoning has well-known impacts for the developing brain of young children, with a large literature documenting the negative effects of elevated blood lead levels on academic and behavioral outcomes. In April of 2014, the municipal water source in Flint, Michigan was changed, causing lead...