This paper uses the random assignment of poor families to treatment and control conditions in the Comprehensive Child Development Program (CCDP) to isolate the causal effect of center-based child care enrollment on child well-being. Operating throughout the early-1990's, the CCDP demonstration...

This paper examines the effects of daily outdoor air pollution variation on student test scores. Using Danish register data for all elementary and lower secondary students, we link home addresses to a 1 km x 1 km pollution grid to measure test day and lifetime pollution exposure. An increase in...