@TechReport{iza:izadps:dp17930,
            	author={Dou, Jialu and Gihleb, Rania and Giuntella, Osea and Lonsky, Jakub},
            	title={Breaking the Early Bell: Lessons from the First Statewide Mandate on School Start Times},
            	year={2025},
	month={May},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={17930},
            	url={https://www.iza.org/publications/dp17930},
	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.},
	keywords={Mental Health;Sleep;School Start Times;Academic Achievement},
            }