“…Fourth, future work could also boost our understanding of the influence process. Researchers could examine the specific mechanisms by which friends and opinion leaders could influence individuals to engage in new behavior (e.g., normative influence, engaging in interpersonal conversations, bringing friends along to specific events; see Maki & Raimi, 2017;Swim, Geiger, Sweetland, & Fraser, 2018). Research could also examine how individual difference factors, such as social network members' identification with the group in question and personal and collective efficacy toward proenvironmental behaviors (Fritsche et al, 2018;Masson & Fritsche, 2014;T.…”