The fundamental originating principle of law and economics (L&E) is that legal decisions should be (and are) based on maximizing efficiency. But L&E proponents do not define “efficiency” in the way agreed to by most economists, as Pareto Efficiency. A Pareto optimal condition is obtained...

In this chapter, written for the book 'Law and Method. Interdisciplinary Research info Law', we describe the methodology of Law and Economics. We start by discussing the mainstream economic approach to law, including the topics of rationality, the use of (sometimes unrealistic) assumptions, the...