“…Heavy alcohol use was selected rather than other forms of substance use, such as smoking, because alcohol use is highly correlated with delinquency and violence (Doran, Luczak, Bekman, Koutsenok, & Brown, 2012;White, Conway, & Ward, 2019), yet may also differentiate a subgroup of youth who increasingly engage in alcohol use, but not other forms of risky behavior (Laska, Pasch, Lust, Story, & Ehlinger, 2009;Wu et al, 2010). Peer and dating violence were selected based on cross-sectional research that has found that these behaviors cooccur in some subgroups of youth, but not others, and thus may differentiate trajectory patterns (Garthe, Sullivan, & Behrhorst, 2018;Heinze et al, 2018;. Each of these behaviors has been found to be prevalent among youth in the United States; for example, in the 2017 National Youth Risk Behavior Survey, 30% of US high school students reported current alcohol use, 14% reported binge drinking, 19% reported having been bullied on school property, and 8% reported having experienced physical dating violence (Kann et al, 2018).…”