Daubert v. Merrell Dow Pharmaceuticals, Inc.

Holding that a trial judge must ensure that all admitted expert testimony "is not only relevant, but reliable"

Lujan v. Defs. of Wildlife

Holding that the elements of standing "must be supported in the same way as any other matter on which the plaintiff bears the burden of proof"

Wal-Mart Stores, Inc. v. Dukes

Holding in Rule 23 context that “[w]ithout some glue holding the alleged reasons for all those decisions together, it will be impossible to say that examination of all the class members' claims for relief will produce a common answer”

Kumho Tire Co. v. Carmichael

Holding that the Daubert gatekeeping standard applies not only to "scientific testimony" but also to "all expert testimony"

General Electric Co. v. Joiner

Holding that under the abuse of discretion standard the appellate court will not reverse unless the ruling is manifestly erroneous

Warth v. Seldin

Holding that Article III requires plaintiffs "to establish that, in fact, the asserted injury was the consequence of the defendants' actions"

Tyson Foods, Inc. v. Bouaphakeo

Holding "persuasiveness is, in general, a matter for the jury" and not grounds for denying class certification unless "no reasonable juror could have believed" plaintiffs' evidence of an essential element of their claim

Bridge v. Phoenix Bond & Indem. Co.

Holding that bidders at a county tax-lien auction plausibly alleged RICO proximate causation when they lost to a competing bidder who lied to the county about complying with the auction's rules

Myers v. Hertz Corp.

Holding that district courts have the discretion to certify a collective action by facilitating notice to potential plaintiffs of the "pendency of the action and of their opportunity to opt-in as represented plaintiffs"

Daubert v. Merrell Dow Pharmaceuticals, Inc.

Holding that expert testimony was inadmissible based on its unreliable methodology notwithstanding "the impressive qualifications of plaintiffs' experts"

Rule 23 - Class Actions

Holding that, to certify a class, the court must find that "questions of law or fact common to class members predominate over any questions affecting only individual members"

Rule 702 - Testimony by Expert Witnesses

Adopting the Daubert standard

Section 2072 - Rules of procedure and evidence; power to prescribe

Granting the Supreme Court, not the parties, authority to "prescribe general rules of practice and procedure" for federal district court cases

Section 1410 - Groundwater; right of action