Back to school: The effect of school visits during COVID-19 on COVID-19 outcomes

Abstract

The effects of school closures on COVID-19 transmission remain unclear, even after the conclusion of the national Public Health Emergency. We use healthcare claims data from 130 million household-week observations linked to smartphone mobility data to measure the effects of changes in county-level visits to schools on COVID-19 outcomes. We use a triple-differences approach that leverages within-county differences in exposure between families with and without school-age children and find modest impacts. We find increases in COVID-19 infection rates, with larger differences in low-income and higher COVID-19 prevalence counties.