Denmark has accepted refugees from a large variety of countries and for more than four decades. Denmark has also frequently changed policies and regulations concerning integration programs, transfer payments, and conditions for permanent residency. Such policy variation in conjunction with...

We exploit two unusual policy features of academic high schools in Seoul, South Korea - random assignment of pupils to high schools within districts and conversion of some existing single-sex schools to the coeducational (coed) type over time - to identify three distinct causal parameters: the...

Denmark has accepted refugees from a large variety of countries and for more than four decades. Denmark has also frequently changed policies and regulations concerning integration programs, transfer payments, and conditions for permanent residency. Such policy variation in conjunction with...