Trial Courts Wrestle With Expert Testimony And Daubert At Class Certification

Expert testimony plays a critical role in nearly all putative class actions, including at the class certification stage where parties rely on expert evidence to address the requirements of Federal Rule of Civil Procedure 23. The Supreme Court has repeatedly held that trial courts must look beyond the pleadings and conduct a searching inquiry to resolve factual disputes about Rule 23's requirements. But the Supreme Court has not explicitly held whether that searching inquiry requires expert testimony to satisfy the Daubert requirements before being considered in deciding a motion to certify. In Wal-Mart Stores, Inc. v. Dukes, the Supreme Court noted that "the District Court concluded that Daubert did not apply to expert testimony at the certification stage of class-action proceedings." 564 U.S. 338, 354 (2011). The Supreme Court expressed skepticism about that holding but did not reject it outright: "We doubt that is so." Id. As we wrote here, the Supreme Court again