RT Journal Article SR Electronic T1 Do Funds for More Teachers Improve Student Outcomes? JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 0523-12892R2 DO 10.3368/jhr.0523-12892R2 A1 Borgen, Nicolai T. A1 Kirkebøen, Lars J. A1 Kotsadam, Andreas A1 Raaum, Oddbjørn YR 2025 UL http://jhr.uwpress.org/content/early/2025/02/28/jhr.0523-12892R2.abstract AB We investigate the effects of a large-scale Norwegian intervention that provided extra teachers to 166 lower secondary schools with relatively high student-teacher ratios and low average grades. We exploit these two margins using a regression discontinuity setup and find that the intervention reduced the student-teacher ratio by around 10%, without crowding out other school resources. The extra funding did not improve test scores and medium-term academic outcomes, and we can reject even small positive effects. We do find that more teachers improved the school environment, including self-reported student well-being, but with the largest impact on aspects of the school environment most weakly associated with better academic outcomes.