symptoms, feeling sad and losing interest in usual activities for at least two consecutive weeks, among high school students … below, by over 15%. Coefficient sizes are similar when comparison groups are restricted to students engaging in correlated …

18-24 year old full-time four-year college students who participated in the 1995 National College Health Risk Behavior … time. Particularly notable is that behavior by underage students appears to drive the relationship …

age 18-24 four-year college students. For having sex, overall or without condoms, large and significant positive … directly leads to risky sex. Some binge drinking-induced promiscuity seems to occur among students, especially males, involved … in long-term relationships. Effects are concentrated among non-Hispanic whites and are not apparent for students in two …

school students during the 1990s and 2000s. The main innovations are explicitly controlling for time-invariant preferences … sex than protective behavior. Effects are much larger for the small fraction of students that has not been taught about …