Although previous research has found that sexually active teens are more likely to suffer from depression, it is not clear whether this association is causal or spurious in nature. This study uses data from the National Longitudinal Study of Adolescent Health to examine whether virginity status...

In volume 23, issue 2 of this journal, Cawley, Markowitz and Tauras used data from the National Longitudinal Survey of Youth 1997 Cohort to estimate the relationship between body weight and smoking initiation. Using maternal obesity status as an instrument, they found strong evidence that...