A point of contention in the refugee crisis involves possible adverse effects on host communities associated with poor, low-skilled migrants with low host-community language knowledge. We use unique matched birth and schooling records to examine the effects of a large influx of poor, non-English-speaking Haitian migrants into Florida public schools immediately following the devastating 2010 earthquake. We find zero or modestly positive estimated effects of these migrants on the educational outcomes of incumbent students in the year of the earthquake or in the 2 years that follow, regardless of the socioeconomic status, grade level, ethnicity, or birthplace of incumbent students.

This article presents the first experimental evidence on the effects of live versus Internet media of instruction. Students in a large introductory microeconomics course at a major research university were randomly assigned to live lectures versus watching these same lectures in an Internet setting where all other factors (e.g., instruction, supplemental materials) were the same. We find modest evidence that live-only instruction dominates Internet instruction. These results are particularly strong for Hispanic students, male students, and lower-achieving students. We also provide suggestions for future experimentation in other settings.

We use population-level data on all Florida children born between 1994 and 2002 to examine the long-term effects of prenatal exposure to environmental toxicants from a Superfund (toxic waste) site. We compare siblings who faced different toxic exposures during gestation because of Superfund site cleanup (or, in other specifications, because of a family move). Children exposed to toxic waste while gestating have substantially worse cognitive and behavioral outcomes than do their unaffected siblings. These results are much larger than what would have been predicted were the effects of Superfund site exposure operating solely through standard measures of birth outcomes.

We use linked birth and education records from Florida to investigate how the identification of childhood disabilities varies by race and school racial composition. Using a series of decompositions, we find that black and Hispanic students are identified with disabilities at lower rates than are observationally similar white students. Black and Hispanic students are overidentified in schools with relatively small shares of minorities and substantially underidentified in schools with large minority shares. Our results are consistent with a heightened awareness among school officials of disabilities in students who are racially and ethnically distinct from the majority race in the school.

Little is known about the role birth order plays in delinquency and adult crime outcomes that carry significant externalities. We use rich data sets from Denmark and Florida to examine these outcomes and explore potential mechanisms. Despite large environmental differences between the areas, we find remarkably consistent results: in families with two or more children, secondborn boys are 20%–40% more likely to be disciplined in school and enter the criminal justice system than are their firstborn male siblings. We rule out health at birth and school quality as mechanisms but find evidence for the role of parental time investment.