Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/130217 
Year of Publication: 
2016
Series/Report no.: 
DIW Discussion Papers No. 1561
Publisher: 
Deutsches Institut für Wirtschaftsforschung (DIW), Berlin
Abstract: 
Do increased instruction hours improve the performance of all students? Using PISA scores of students in ninth grade, we analyse the effect of a German education reform that increased weekly instruction hours by two hours (6.5 percent) overalmost five years. In the additional time, students are taught new learning content. On average, the reform improves student performance. However, treatment effects are small and differ across the student performance distribution. While low-performing students do not benefit, high-performing students benefit the most. The findings suggest that increases in instruction hours can widen the gap between low- and high-performing students.
Subjects: 
instruction time
student achievement
PISA
G8-high school reform
quantile regressions
curriculum
difference-in-differences
JEL: 
I21
I24
I28
D04
J24
Document Type: 
Working Paper

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