RT Journal Article T1 The effect of weekly instruction time on academic achievement: the Spanish case A1 López-Agudo, Luis Alejandro A1 Marcenaro-Gutiérrez, Óscar David K1 Política educativa - España K1 Enseñanza secundaria - Aspectos económicos AB This research checks if the amount of weekly instruction time received by 15 year-old Spanish students actually affects their academic achievement and if this effect differs by Autonomous Community. The employed student fixed effects between-subjects let us isolate this effect of instruction time from other covariates. Results show that there is not any significant effect of instruction time on academic achievement, being this conclusion extended to the Autonomous Communities under analysis. This result suggests that a previous evaluation of the weekly instruction time set by the Spanish 2013 education law would have been needed before its implementation. PB Instituto de Estudios Fiscales YR 2019 FD 2019 LK https://hdl.handle.net/10630/39283 UL https://hdl.handle.net/10630/39283 LA eng NO 30. López-Agudo, L. A., Marcenaro-Gutiérrez, O. D. (2019). “The effect of weekly instruction time on academic achievement: the Spanish case”. Hacienda Pública Española, 230(3), 63-93. NO Política de acceso abierto: https://hpe-rpe.org/open-access/ DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 20 ene 2026