How does law change society? In the rational actor model, law affects behavior only by changing incentives and information-the command and coordination function of law. Under the view that humans are social animals, law is also a guidepost for social norms that regulate behavior-the expressive...

Economists have traditionally treated preferences as exogenously given. Preferences are assumed to be influenced by neither beliefs nor the constraints people face. As a consequence, changes in behaviour are explained exclusively in terms of changes in the set of feasible alternatives. Here the...