Discussion Papers no. 858

Long term impacts of class size in compulsory school

How does class size in compulsory school affect peoples’ long run education and earnings?

We use maximum class size rules and Norwegian administrative registries allowing us to observe outcomes up to age 48. We do not find any indication of beneficial effects of class size reduction in compulsory school. For a 1 person reduction in class size we can rule out effects on income as small as 0.087 percent in primary school and 0.12 percent in middle school. Population differences in parental background, school size or competitive pressure do not appear to reconcile our findings with previous studies.

About the publication


Long term impacts of class size in compulsory school


Edwin Leuven and Sturla A. Løkken

Series and number

Discussion Papers no. 858


Statistisk sentralbyrå


Discussion Papers



Number of pages


About Discussion Papers

Discussion papers comprise research papers intended for international journals and books. A preprint of a Discussion Paper may be longer and more elaborate than a standard journal article as it may include intermediate calculations, background material etc.