We use six years of data on student test performance to evaluate the effectiveness of certified, uncertified, and alternatively certified teachers in the New York City public schools. On average, the certification status of a teacher has at most small impacts on student test performance....

Lead pollution is consistently linked to cognitive and behavioral impairments, yet little is known about the benefits of public health interventions for children exposed to lead. This paper estimates the long-term impacts of early-life interventions (e.g. lead remediation, nutritional...

Lead pollution is consistently linked to cognitive and behavioral impairments, yet little is known about the benefits of public health interventions for children exposed to lead. This paper estimates the long-term impacts of early-life interventions (e.g. lead remediation, nutritional...

How do early-life experiences shape political identity? In this paper, we study how a shock to the social lives of youth affected their party affiliation in adulthood. Specifically, we examine the end of race-based busing in Charlotte-Mecklenburg schools (CMS), an event that led to large changes...

How do early-life experiences shape political identity? In this paper, we study how a shock to the social lives of youth affected their party affiliation in adulthood. Specifically, we examine the end of race-based busing in Charlotte-Mecklenburg schools (CMS), an event that led to large changes...