Executive Summary To better understand class action litigation and its impact on the state court system, the Office of Court Research of the Administrative Office of the Courts initiated the Study of California Class Action Litigation in collaboration with the University of California, Hastings College of the Law. The study relied primarily on case file review of a large, random sample of class action cases drawn from courts across California. This summary accompanies the release of the second report from the study which focuses on a pivotal decision in class action litigation: class certification. Prior to this study, empirical data relating to class certification in California was almost non-existent, despite the importance of the decision to the maintenance of a class action case and the debates that often swirl around its impact on litigation. This report provides the following findings on the subject: Certification Activity Looking at all cases in the database, almost three-quarters of cases filed as class actions showed no signs of class certification activity after some sort of class reference was put forth the initial filing; The rate of class certification (by any means) decreased by more than 50 percent over the study years; Only about 13 percent of study case ever had a motion for class certification filed during the life of the case. Forty-six percent of these motions were granted; Most classes are certified as part of a classwide settlement agreement, not through a litigated motion for class certification; Certification by Case Type Employment cases show the highest frequency of class certification activity and have the highest rate of classes that are certified as part of a classwide settlement agreement; The higher rate of certification in employment cases may be because the certification inquiry is more straightforward for employee classes, perhaps in part because these classes have characteristics that more easily satisfy the standards for certification. Specifically, employment class action cases are much more likely to specify a precise number in defining the class size thus facilitating the definition and identification of the class;
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