Gender has not typically been found to moderate selection or exposure effects for alcohol use (cf. Burk et al., 2012), but it may for onset, as the hypothesized greater importance of close friendships to girls (Schulenberg et al., 1999) may be more important than the greater susceptibility to drinking sometimes found for boys (Anderson, Tomlinson, Robinson, & Brown, 2011; Windle, 2000).
