The hallmark of Judge Posner's class action decisions is rigorous review to ensure that aggregate litigation serves the best interests of class members and does not unduly pressure defendants to settle. Although he championed class actions, especially as a way to provide efficient justice in...

Should the party who loses in litigation be forced to pay the legal fees of the winner? This paper surveys the economic literature regarding the effects of legal fee shifting on a variety of decisions arising before and during the litigation process. Section 2 provides a brief survey of the...

This paper examines the law and economics of third-party financed litigation. I explore the conditions under which a system of third-party financiers and litigators can enhance social welfare, and the conditions under which it is likely to reduce social welfare. Among the applications I consider...

This paper empirically compares civil procedure in common law and civil law countries. Using World-Bank and hand-collected data, and unlike earlier studies that used predecessor data sets, this paper finds no systematic differences between common and civil law countries in the complexity,...

Fundamental choices are to be made when fashioning a system or combination of systems concerning multi-party and collective relief (see section II of this article). These include:economic access to justice (section III), opt-out 'class' litigation (notably the status of `representatives' suing...

The Fifth Amendment guarantees criminal defendants the right to silence, blocking the court from drawing adverse inferences from the defendant's silence. This article investigates the conditions under which extending such protection to civil defendants might increase (or decrease) social...

The conduct of adjudication is often influenced by motions––requests made by litigants to modify the course of adjudication. The question studied in this article is why adjudication should be designed so as to permit the use of motions. The answer developed is that litigants will naturally...

Class actions aim to bring economies of scale to bear on legal proceedings, by joining cases that have a common cause of action against a common defendant into a single lawsuit leading to a judgment or settlement that binds the entire class. Legal procedures, lawyer time, evidence by experts and...

The basic rule in civil litigation is that the plaintiff carries the burden of proof and the general standard of proof is preponderance of the evidence. The plaintiff prevails if she establishes her case with a probability exceeding 0.5. Drawing on insights from behavioral economics and new...