This paper examines the effects of sorting and mixing on academic performance of high school students in South Korea. The Korean government has vigorously promoted mixing for more than three decades, replacing competitive entrance examinations at individual schools by a lottery-based enrollment...

Though a net brain gain has tended to be seen as a benefit and referred to as a 'beneficial brain drain' in the literature, its welfare impact for source country residents - or non-migrants - is at best ambiguous. Increased educational investment in response to a brain drain is equivalent to a...