This paper evaluates the long-term effects of class size in primary school. We use rich data from Sweden and exploit variation in class size created by a maximum class size rule. Smaller classes in the last three years of primary school (age 10 to 13) are beneficial for cognitive and...

In Sweden, children typically start compulsory school the year they turn 7. Individuals born around the new year have about the same date of birth but enter school at different ages. We exploit this source of exogenous variation to identify effects of age at school entry on educational...

In a comment to Dahlberg, Edmark and Lundqvist (2012), Nekby and Pettersson-Lidbom (2012) argue (i) that the refugee placement program should be measured with contracted rather than actually placed refugees, and claim that the correlation between the two measures is insignificant and close to...