We examine college students’ interaction within classrooms and estimate peer effects on their academic performance. We exploit a unique seating rule at a university in South Korea, known as the fixed-seat system. We propose a novel identification strategy based on students’ repeated...

We compare two groups of the non-student Korean population - native-born South Koreans (SK) and North Korean refugees (NK) - with contrasting institutional and cultural backgrounds. In our experiment, the subjects play dictator games under three different treatments in which the income source...

Does single motherhood adversely affect infant health? This question is not easy to answer because of the endogeneity of coresidence during pregnancy. In this paper, we exploit quasi-natural variation in single motherhood from the moment of conception to that of birth arising from marriageable...