Obesity among children is an important public health concern, and social networks may play a role in students' habits that increase the likelihood of being overweight. We examine data from South Korean middle schools, where ...

Gender disparities in academic performance may be driven in part by the interaction of teacher and student gender, but systematic sorting of students into classrooms makes it difficult to identify causal effects. The authors ...

The authors exploit data from middle schools in Seoul, South Korea, where students and teachers are randomly assigned to classrooms, and find that female students taught by a female versus a male teacher score higher on ...

This dissertation investigates, in a causal way, how interactions of student with teachers and peers affect his or her educational outcome. First, we use random assignment of students to Korean middle school classrooms ...