Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Militaries around the world perform training exercises in preparation for war. We study the relationship between in utero exposure to military exercises (bombing) and early-life health outcomes, combining data on naval bombing exercises in Vieques, Puerto Rico, and the universe of births from 1990 to 2003. Using a differences-in-differences design, we find that the sudden end of bombing practices is associated with a 56–79% decrease in the incidence of congenital anomalies. The evidence is generally consistent with the channel of environmental pollution through increases in contaminant levels in waters surrounding the live impact area.