On Tuesday, the Court of Appeal (Fourth Appellate District, Division One) handed down an interesting opinion on expert testimony in the class certification context.
In Apple Inc. v. Superior Court (Shamrell), ___ Cal.App.5th ___ (Jan. 29, 2018), the defendant objected to the plaintiffs' expert testimony in support of class certification, arguing that the testimony was unreliable and therefore inadmissible under Sargon Enterprises, Inc. v. University of Southern California, 55 Cal.4th 747 (2012). Apple, slip op. at 6, 8, 13. The trial court declined to apply Sargon at the class certification stage, and certified the class. Id. at 15-16.
The Court of Appeal reversed. holding that the trial court's express refusal to apply Sargon was error:
Sargon applies to expert opinion evidence submitted in connection with a motion for class certification. A trial court may consider only admissible expert opinion evidence on class certification, and there is only one standard for admissibility of expert opinion evidence in California. Sargon describes that standard.
....
And, even were we free to disregard Sargon (and we are not), we would conclude that its standards for admissibility apply here. Although class certification is merely a procedural device, and not a determination on the merits, it has profound consequences for the trial court's management of the litigation and the rights of the parties. The corrosive effects of improper expert opinion testimony may be felt with substantial force at class certification, just as at summary judgment or at trial. The trial court's gatekeeping role serves a similar salutary purpose in each of these contexts.
Id. at 1, 22-23.
One of the trial court's concerns was that if Sargon applied at the certification stage, class certification motions would become "these massive hearings." Id. at 9. The Court of Appeal dispelled this concern by explaining:
Sargon's discussion of admissibility is plainly substantive, and nothing in that opinion mandates or even encourages holding such a hearing for every expert, at trial or otherwise. Whether to hold a hearing remains in the trial court's discretion. And Sargon's substance is not unduly burdensome for trial courts. It merely ensures that expert opinion evidence is reasonable, reliable, and logical.
Id. at 24.
Apple is the latest of three recent decisions addressing expert testimony at the certification stage.
In ABM Industries Overtime Cases, ___ Cal.App.5th ___ (Dec. 11, 2017; pub. ord. Jan. 10, 2018) (discussed in this blog post), the Court of Appeal (First Appellate District, Division Four) cited Sargon, but reversed the trial court's order excluding the opinion testimony of plaintiffs' expert witness. The Court held that the witness was in fact qualified to offer such opinion testimony, and that "questions regarding the degree of an expert’s knowledge go more to the weight of the evidence presented than to its admissibility." ABM Industries, slip op. at 13-15 (emphasis in original).
The other recent decision on expert testimony at the class certification stage did not mention Sargon at all. Duran v. U.S. Bank Nat'l Assn., ___ Cal.App.5th ___ (Jan. 17, 2018) (First Appellate District, Division One) (also discussed in this blog post). Presumably, the defendant did not argue that the testimony was inadmissible, but rather that it was insufficient to prove that common questions predominated.