Social norm
Definition

There are varied definitions of social norms, but there is agreement among scholars that norms are:

In 1965, Jack P. Gibbs identified three basic normative dimensions that all concepts of norms could be subsumed under:

According to Ronald Jepperson, Peter Katzenstein and Alexander Wendt, "norms are collective expectations about proper behavior for a given identity." Wayne Sandholtz argues against this definition, as he writes that shared expectations are an effect of norms, not an intrinsic quality of norms. Sandholtz, Martha Finnemore and Kathryn Sikkink define norms instead as "standards of appropriate behavior for actors with a given identity." In this definition, norms have an "oughtness" quality to them.

Michael Hechter and Karl-Dieter Opp define norms as "cultural phenomena that prescribe and proscribe behavior in specific circumstances." Sociologists Christine Horne and Stefanie Mollborn define norms as "group-level evaluations of behavior." This entails that norms are widespread expectations of social approval or disapproval of behavior. Scholars debate whether social norms are individual constructs or collective constructs.

Economist and game theorist Peyton Young defines norms as "patterns of behavior that are self-enforcing within a group." He emphasizes that norms are driven by shared expectations: "Everyone conforms, everyone is expected to conform, and everyone wants to conform when they expect everyone else to conform." He characterizes norms as devices that "coordinate people's expectations in interactions that possess multiple equilibria."

Concepts such as "conventions", "customs", "morals", "mores", "rules", and "laws" have been characterized as equivalent to norms. Institutions can be considered collections or clusters of multiple norms. Rules and norms are not necessarily distinct phenomena: both are standards of conduct that can have varying levels of specificity and formality. Laws are a highly formal version of norms. Laws, rules and norms may be at odds; for example, a law may prohibit something but norms still allow it. Norms are not the equivalent of an aggregation of individual attitudes. Ideas, attitudes and values are not necessarily norms, as these concepts do not necessarily concern behavior and may be held privately. "Prevalent behaviors" and behavioral regularities are not necessarily norms. Instinctual or biological reactions, personal tastes, and personal habits are not necessarily norms.
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