Mayer Brown - Class Defense Blog

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Despite Wal-Mart Stores v. Dukes, Ninth Circuit approves statistical sampling to prove that an “unofficial” common policy exists

There seem to be two prevailing conceptions of class actions. In one view, a class action is a way of determining many similar claims at once by evaluating common evidence that reliably establishes liability (and lays a ground…more
| Civil Procedure, Labor & Employment Law

Fourth Circuit puts teeth into ascertainability, commonality, and predominance requirements for class certification

Sometimes it’s hard to know who’s in a class without substantial individualized inquiries. Can a court certify a class of persons with allegedly similar injuries by pigeonholing the question of class membership as a question of…more
| Civil Procedure

Getting to “yes”: Ninth Circuit provides guidance on formation of “browsewrap” arbitration agreements

In the three years since AT&T Mobility LLC v. Concepcion, courts have largely been rejecting substantive attacks on arbitration agreements that waive class actions. By contrast, in some cases plaintiffs have succeeded in…more
| Alternative Dispute Resolution (ADR), Civil Procedure, Commercial Law & Contracts

Third Circuit to Consider FTC’s Authority Over Data Security Standards in FTC v. Wyndham

We have written previously about the FTC’s action arising out of the data breach suffered by the Wyndham hotel group, and the company’s petition for permission to pursue an interlocutory appeal regarding the FTC’s use of its…more
| Antitrust & Trade Regulation, Civil Procedure, Consumer Protection, Privacy, Science, Computers, & Technology

Class Action Fairness Act Roundup

Nine years after the Class Action Fairness Act of 2005 (“CAFA”) was enacted, parties continue to fight over when federal jurisdiction over significant class and mass actions is proper. In this post, we provide a rundown of…more
| Civil Procedure

Wyndham Seeks Immediate Appeal Over Whether FTC Has Authority To Regulate Data Security

We have written previously about FTC v. Wyndham Worldwide Corp., currently pending in federal district court in New Jersey, and its potential significance for data security class actions. A recent opinion in that case has…more
| Antitrust & Trade Regulation, Civil Procedure, Consumer Protection, Privacy, Science, Computers, & Technology

ERISA Stock-Drop Class Actions: As One Door Opens for Plaintiffs, Another Closes

In ERISA stock-drop class actions, plaintiffs routinely allege that their employers breached a duty of prudence by permitting employees to invest their retirement assets in their company’s stock. Until today, defendants…more
| Civil Procedure, Labor & Employment Law, Finance & Banking, Securities Law

Why The Supreme Court’s Decision in Halliburton Is Bad News For Investors And The Public

Yesterday’s Supreme Court ruling in the Halliburton case leaves the securities class action system pretty much unchanged. And that isn’t because the Supreme Court examined the system and concluded it is working well and makes…more
| Civil Procedure, Business Torts, Securities Law

Supreme Court Refuses To Overturn Fraud-On-The-Market Presumption, But Adjusts Presumption To Allow Evidence of Absence Of “Price Impact” At Class Certification Stage

The securities class action industry was launched a quarter-century ago when the Supreme Court recognized the so-called “fraud-on-the-market” presumption of reliance in most putative securities class actions. The result has…more
| Civil Procedure, Business Torts, Securities Law

California Court Says No Need To Resolve Disputes Over Substantive Law In Evaluating Whether Class Can Be Certified

Suppose that you’re a trial court considering a motion for class certification. And suppose that the parties present you with two competing statutory interpretations. One legal standard permits the case to be adjudicated with…more
| Civil Procedure, Labor & Employment Law

POM v. Coke Does Not Alter The Landscape for Food False Advertising Class Actions

After the oral argument in POM Wonderful LLC v. Coca-Cola Co., No. 12-761, the Supreme Court appeared all but certain to allow competitors to sue for false advertising under the Lanham Act over labels of FDA-regulated food…more
| Civil Procedure, Communications & Media Law, Conflict of Laws, Consumer Protection, Products Liability

California Supreme Court Rejects Exceptionally Poor Sampling Method, But Leaves Open Many Questions About Sampling And Class Certification

In Duran v. U.S. Bank N.A., the California Supreme Court recently addressed an important question in the context of state-court class actions: Can plaintiffs invoke statistical sampling in an attempt to prove class-wide…more
| Civil Procedure, Labor & Employment Law

Primary Jurisdiction is Gaining Some Weight in the Food Court

The plaintiffs’ bar continues to file consumer class actions challenging food and beverage labels en masse, especially in the Northern District of California—also known as the “Food Court.”…more
| Administrative Law, Civil Procedure, Communications & Media Law, Consumer Protection, Products Liability

More Thoughts On Ascertainability And Why It Matters In Deciding Whether To Certify A Class Action

Can you have a class action if you can’t figure out who’s in the proposed class? According to many in the plaintiffs’ bar, the answer is “yes.”…more
| Civil Procedure, Products Liability

Third Circuit Rejects Effort At End Run Around The Ascertainability Requirement

We previously wrote about the Third Circuit’s decision in Carrera v. Bayer Corp., which reversed a district court’s class-certification order because there was no reliable way to ascertain class membership—indeed, no way to…more
| Civil Procedure, Civil Remedies, Communications & Media Law, Products Liability
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