PT - JOURNAL ARTICLE AU - Brent Kreider AU - Steven C. Hill TI - Partially Identifying Treatment Effects with an Application to Covering the Uninsured AID - 10.3368/jhr.44.2.409 DP - 2009 Mar 31 TA - Journal of Human Resources PG - 409--449 VI - 44 IP - 2 4099 - http://jhr.uwpress.org/content/44/2/409.short 4100 - http://jhr.uwpress.org/content/44/2/409.full SO - J Hum Resour2009 Mar 31; 44 AB - We extend the nonparametric literature on partially identified probability distributions and use our analytical results to provide sharp bounds on the impact of universal health insurance on provider visits and medical expenditures. Our approach accounts for uncertainty about the reliability of self-reported insurance status as well as uncertainty created by unknown counterfactuals. We construct health insurance validation data using detailed information from the Medical Expenditure Panel Survey. Imposing relatively weak nonparametric assumptions, we estimate that under universal coverage monthly per capita provider visits and expenditures would rise by less than 8 percent and 16 percent, respectively, across the nonelderly population.