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Class Certification, the Merits, and Expert Evidence

36 Pages Posted: 24 Jan 2009  

David S. Evans

Global Economics Group; University College London

Date Written: Fall 2002


What standards should the courts use to determine whether or not to certify the class proposed by the plaintiffs? The answer to this question has ramifications for many areas of the law in which class actions have become an oft-used method for pursuing claims against alleged wrongdoers, including mass torts, securities, employment discrimination, and antitrust. This Article discusses two related aspects of the class-certification standard that determine where that standard lies on the strictness spectrum. One concerns whether evidence that bears on the merits of the claims should be walled off from the analysis of the class certification questions. The other deals with whether the courts should weigh expert evidence on the class certification requirements.

Keywords: class certification, standards, strict standards, claims on the merit, expert evidence

JEL Classification: K13, K22, K23, K41

Suggested Citation

Evans, David S., Class Certification, the Merits, and Expert Evidence (Fall 2002). George Mason Law Review, Vol. 11, No. 1, 2002. Available at SSRN:

David S. Evans (Contact Author)

Global Economics Group ( email )

111 Devonshire St.
Suite 900
Boston, MA 02108
United States

University College London ( email )

Gower St
London WC1E OEG, WC1E 6BT
United Kingdom

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