outcomes between richer and poorer students who leave school with good attainment levels. From a set of policies aimed at … targets the supply side by enforcing universities to give preferential admission to poorer students who graduate near the top … of their secondary school class. This policy would substantially narrow earnings gaps between richer and poorer students …

estimates, while causal, may also reflect peer effects due to differences in peer quality of non-randomized students. We exploit … universal random assignment of students to high schools in certain areas of South Korea to provide estimates of school effects …