Causal Effect of Sleep Duration on Body Weight in Adolescents

A large number of observational epidemiologic studies have reported consistent associations between short sleep duration and increased body weight, particularly in children and adolescents. Causal evidence on the effect of sleep duration on body weight is still limited, however.This study exploits a unique natural experiment that can be argued to have increased sleep duration in an adolescent population in South Korea. In March 2011, authorities...