Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/320524 
Year of Publication: 
2025
Series/Report no.: 
IZA Discussion Papers No. 17930
Publisher: 
Institute of Labor Economics (IZA), Bonn
Abstract: 
This study evaluates the impact of California's SB 328, the first statewide mandate delaying school start times for middle and high schools, on adolescent sleep, mental health, and academic outcomes. Using YRBS, ATUS, SEDA, and SAT data, we apply difference-in-differences and matched DID methods. SB 328 led to significant improvements in sleep duration and academic performance. We find suggestive mental health benefits, though estimates are imprecise, and substantial heterogeneity in effects, with stronger gains among boys and Hispanic students across both sleep and academic outcomes.
Subjects: 
Mental Health
Sleep
School Start Times
Academic Achievement
JEL: 
I10
I20
Document Type: 
Working Paper

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