A Stanford Law School study about securities class actions is mentioned by the Daily Journal in an article about the future of Lerach Coughlin Stoia Geller Rudman & Robbins:

According to a Stanford Law School study, the number of securities class actions filed between January and June this year contracted to 57. Over the last decade, the same monthly range has averaged 101 filings. A stronger stock market with less volatility accounted for the decline in part, according to the study.