“…As such, it is likely that selection and socialization effects operate within a complex and dynamic developmental context in which peers are but one important factor. Although only a few studies have tested variables from multiple levels simultaneously (Ennett et al, 2008; Trucco, Colder, Wieczorek, Lengua, & Hawk, 2014), there is evidence in the literature that temperament (Giancola & Parker, 2001; Windle, 2000), adolescent problem behavior (Scalco, et al, 2014), parental drinking (Engels et al, 1999), and early pubertal timing (Wichstrom, 2001), as well as demographic variables such as gender, age, and ethnicity (Haynie & Osgood, 2005) predict peer delinquency and peer SU, which are generally interpreted as contributing to selection effects (homophily). Once selection has occurred parenting is likely involved in maintaining or exacerbating adolescent and peer SU over time through inadequate parental monitoring which provides increased opportunity to spend unstructured time with peers (Osgood et al, 1996).…”