 That said, we stress that social preferences should not be conflated with social norms. Social preferences capture stable dispositions toward an exogenously defined principle of conduct (Binmore 2010). By contrast, social norms are better studied as group-specific solutions to strategic problems (Sugden 1986; Bicchieri 1993; Young 1998b). Such solutions are brought about by a particular class of preferences (“norm-driven preferences”), conditional on the relevant set of empirical beliefs and normative expectations. In fact, we stress that “what constitutes fair or appropriate behavior” often varies with cultural or situational factors (Henrich et al. 2001; Cappelen et al. 2007; Ellingsen et al. 2012). Accounting for endogenous expectations is therefore key to a full understanding of social norms.