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...

A core insight from early behavioral economics is that much of human judgment and behavior is influenced by "fast thinking" that is intuitive, associative, and automatic; very little human thinking resembles the rational thinking that characterizes homo economicus. What is less well-recognized is...