This research advances our knowledge of social networks by demonstrating that social networks can have significant effects on consumer judgment and decision making, even in tasks that are unrelated to social network use or more general social behavior. Previous research has demonstrated that social networks can have a positive effect on how people feel about themselves and their well-being. For instance, social network use (or, more generally, online community activity) has been shown to enhance self-esteem (Gonzales and Hancock 2011; Valkenburg et al. 2006), increase social capital (Ellison et al. 2007), bolster emotional well-being (Buechel and Berger 2012), and lead to increased prosocial behaviors (Stephen and Galak 2012). In contrast, our research demonstrates that social network use may also have a detrimental effect on well-being by leading certain people to exhibit lower self-control.