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Class Certification Expert Testimony

Zelle  LLP

Judge Donato Excludes Expert Opinion Testimony, Denies Class Certification in Klein V. Meta

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On January 24, 2025, Judge Donato granted Meta’s motion to exclude the opinions of user plaintiffs’ expert on antitrust injury. Finding that the class certification motion depended on the expert opinions offered by Dr....more

Robinson Bradshaw

Old Dogs and New Tricks: Supreme Court Denies Certiorari in Ninth Circuit Case Allowing Reliance on Inadmissible Expert Work for...

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Earlier this month, the Supreme Court declined to hear an appeal from the Ninth Circuit’s decision in Lytle v. Nutramax Laboratories, Inc. affirming the certification of a class of owners of elderly dogs, alleging that the...more

Alston & Bird

Insurance Insights for the Cold, Dark Winter Nights

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Welcome to the latest issue of Insurance Insights, a gathering of notable legal developments and trends relevant to the insurance industry. In this issue, fires alter the landscape of California insurance, an expert’s...more

Faegre Drinker Biddle & Reath LLP

Sixth Circuit Applies FRE 702 to Class Certification Experts and Highlights Commonality and Predominance Issues for Products That...

Class certification decisions under Rule 23 of the Federal Rules of Civil Procedure mark a critical stage in any putative class action lawsuit. Rule 23(a) requires plaintiffs to prove, among other things, that “there are...more

Kilpatrick

Eighth Circuit concludes that admissibility at class certification is a “red-herring”

Kilpatrick on

In Cody v. City of St. Louis, 103 F.4th 523 (8th Cir. 2024), the Eight Circuit maintained its position that admissibility standards do not apply strictly at the class certification stage, thereby solidifying a circuit split...more

DCI Consulting

[Webinar] Expert Summit for Employment Attorneys: NEW BONUS SESSION: Expert Testimony in Wage and Hour Litigation - March 2nd,...

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Federal and state wage and hour litigation has been an area of concentration for Industrial/Organizational Psychologists for decades. These cases address alleged discrimination in wage-based employment practices such as...more

Faegre Drinker Biddle & Reath LLP

Listen Up Class: The Role of Daubert at the Class Certification Stage in the Ninth Circuit

Class certification is the feature fight of any putative class action lawsuit. If granted, it can multiply the stakes of a case several hundred- or thousand-fold. If denied, it can signal the end of the litigation. Because of...more

Kilpatrick

Seven Key Takeaways: Class Certification in the Ninth Circuit – Predominance

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Kilpatrick Townsend partner Jay Bogan, along with three other panel members, recently presented “Class Certification after Olean v. Bumble Bee: Expert Testimony, Uninjured Class Members, and Article III Standing.” This...more

Faegre Drinker Biddle & Reath LLP

Exclusion of Damages Expert at Class Certification Stage Results in Partial Denial of Certification Motion

Just a decade ago, it was still an open question whether parties could challenge the admissibility of expert testimony in class certification proceedings. The United States Supreme Court recognized the issue in Wal-Mart...more

McGuireWoods LLP

Northern District of Ohio Holds Expert Evidence Must Be Admissible to Be Considered at Class Certification

McGuireWoods LLP on

As we touched on last summer, whether a district court may certify a class action without resolving challenges to the admissibility of fact or expert evidence is still an unsettled question. This question is particularly...more

Wiley Rein LLP

4 Important Class Cert. Issues From 2 Data Breach Cases

Wiley Rein LLP on

Data breach lawsuits are challenging cases for plaintiffs. Assuming they are able to survive a motion to dismiss on grounds of Article III standing in the first instance, plaintiffs next bear the high burden of achieving...more

Bradley Arant Boult Cummings LLP

Setting Boundaries for the Field of Discretion: Fifth Circuit Clarifies that Daubert Standard Applies to Expert Opinions at Class...

In a decision that narrows the path to class certification in federal court, the Fifth Circuit has held that a plaintiff must clear the Daubert hurdle when expert evidence is relevant to the decision of a federal court to...more

King & Spalding

California Federal Court Grants Summary Judgment to Auto Manufacturer After Striking Plaintiffs’ Damages Expert Due to Faulty...

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On September 11, the Central District of California granted summary judgment in a putative class action involving an alleged defect in Honda vehicles. The court’s order provides a thorough dissection of the methodological...more

King & Spalding

U.S. District Court Denies Class Certification Motion in Aluminum Rate-Manipulation Case Based on Improper Use of Statistical...

King & Spalding on

On July 23, 2020, Judge Paul A. Englemayer of the U.S. District Court for the Southern District of New York denied a motion to certify a proposed class of direct purchasers of aluminum in a decision that may signal a trend...more

Patterson Belknap Webb & Tyler LLP

Flushable Wipes, Take Three: The Second Circuit Gets Injunctive Standing Right, But Classwide Damages Models Wrong

As our readers know, we’ve kept a close eye on the “flushable wipes” litigation—known variously as Kurtz v. Costco and Belfiore v. Procter & Gamble—as it has bounced between Judge Weinstein’s courtroom in the Eastern District...more

Kilpatrick

Design defect class actions: split Ninth Circuit panel affirms exclusion of common defect expert testimony

Kilpatrick on

Takeaway: Federal appellate courts review a district court’s rulings on motions for class certification and to exclude expert testimony for an abuse of discretion. The Ninth Circuit’s recent decision in Grodzitsky v....more

Patterson Belknap Webb & Tyler LLP

Update: Flushable Wipes

A few months ago, we wrote about the Second Circuit’s oral argument in the “flushable” hygienic wipes consumer class action cases. And now, the septic saga continues....more

McDermott Will & Emery

[Event] Wage The Battle To Win The War: Expert Challenges At Class Certification - September 24th, Chicago, Illinois

Certifying an antitrust class under Rule 23 has become a battle. In the last 20 years, courts have been changing the game around Rule 23 interpretation, and rigorous analysis at class certification has made briefing...more

Patterson Belknap Webb & Tyler LLP

Proving Retail Sales Figures In Consumer Class Actions: Different Approaches Lead To Very Different Results

To prove damages in a consumer class action, the named plaintiff must show—among other things—how many units of the defendant’s product were purchased by consumers in the relevant state (or states). This is easier said than...more

BakerHostetler

Trial Courts Wrestle with Expert Testimony and Daubert at Class Certification

BakerHostetler on

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....more

Payne & Fears

Key California Employment Law Cases: December 2018

Payne & Fears on

This month’s key employment law cases address meal periods and payment of wages....more

Bradley Arant Boult Cummings LLP

They Don’t Call It the Wild West for Nothing: The Ninth Circuit Reverses Denial of Class Certification Because Trial Court Kept...

The Ninth Circuit’s decision not to grant en banc rehearing in Sali v. Corona Regional Medical Center should all but guarantee that the issue of expert testimony at the class certification stage is heading to the Supreme...more

Womble Bond Dickinson

Class Discovery Nightmare: Court Orders Defendant to Turn Itself Inside Out to Provide Account-Level Data in TCPA Class Action

Womble Bond Dickinson on

Hi everyone! Well, I’m sure you’ve heard the good news from the Czar by now, and we’re all very excited here at TCPAland. Boy what a celebration I had when I found out. I put the kids the bed, had a glass of champs with my...more

Jackson Lewis P.C.

Ninth Circuit Permits Use Of “Inadmissible” Expert Testimony For Class Certification Purposes

Jackson Lewis P.C. on

The U.S. Court of Appeals for the Ninth Circuit just denied a request to review en banc a panel ruling that authorizes trial courts to consider evidence that would be inadmissible at trial when deciding whether a class may be...more

Orrick, Herrington & Sutcliffe LLP

Cert Denied In Potential Harbinger For California Equal Pay Act Class Actions

On August 28, 2018, a judge in Los Angeles County Superior Court issued one of the first decisions – if not the first decision – on a motion to certify a putative class action under the state’s revised Equal Pay Act, Cal....more

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