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Piling On? An Empirical Study Of Parallel Derivative Suits, Jessica Erickson

Law Faculty Publications

Using a sample of all companies named as defendants in securities class actions between July 1, 2005 and December 31, 2008, we study parallel suits relying on state corporate law arising out of the same allegations as the securities class actions. We test several ways that parallel suits may add value to a securities class action. Most parallel suits target cases involving obvious indicia of wrongdoing. Moreover, we find that although a modest percentage of parallel suits are filed first, over 80 percent are filed after a securities class action (termed “follow-on” parallel suits). We find that parallel suits and, …