Car exhaust is a major source of air pollution, but little is known about its impacts on population health. We exploit the dispersion of emissions-cheating diesel cars−which secretly polluted up to 150 times as much as gasoline cars−across the United States from 2008-2015 as a natural...

One literature documents a significant, black-white gap in average test scores, while another finds a substantial narrowing of the gap during the 1980's, and stagnation in convergence after. We use two data sources – the Long Term Trends NAEP and AFQT scores for the universe of applicants to...

The large number of overweight children in the U.S. has led school administrators and researchers to examine how aspects of the school environment affect children's dietary behavior and health. In addition to consuming nutrient rich food and exercising regularly, nutritionists have suggested...