“…Several studies have shown the efficacy of Environmental Prevention strategies to reduce community alcohol problems, including underage drinking, by reducing commercial alcohol availability (Holder et al, 2000;Treno, Gruenewald, Lee, & Remer, 2007;Treno & Lee, 2002;Wagenaar, Toomey, & Erickson, 2005). However, few investigators have described interventions on alcohol use among AI/AN youths (see Cheadle et al, 1995;Gabriel, Leichtling, Bolan, & Becker, 2013;Kulis, Ayers, & Harthun, 2017;May & Moran, 1995;Usera, 2017;Wagenaar, Livingston, Pettigrew, Kominsky, & Komro, 2018;Whitesell et al, 2012;Williams & Perry, 1998). A few studies have included AI/ANs in the study design but were not powered to test for effects that might be specific to the AI/AN sample (Livingston et al, 2018;Perry et al, 2000;Perry et al, 1996).…”