Fredriksson, Peter; Öckert, Björn; Oosterbeek, Hessel - In: The Quarterly Journal of Economics 128 (2013) 1, pp. 249-285
This article 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...