564 U.S. 338 (2011) Cited 6,668 times 505 Legal Analyses
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”
521 U.S. 591 (1997) Cited 6,975 times 69 Legal Analyses
Holding that courts are "bound to enforce" Rule 23's certification requirements, even where it means decertifying a class after they had reached a settlement agreement and submitted it to the court for approval
503 U.S. 258 (1992) Cited 1,669 times 8 Legal Analyses
Holding that the Securities Investor Protection Corporation (SIPC) could not recover under RICO for stock-manipulation scheme that bankrupted broker-dealers, triggering a statutory requirement that SIPC meet the broker-dealers' obligations to their customers
547 U.S. 451 (2006) Cited 850 times 5 Legal Analyses
Holding that a business could not recover against its competitor for a scheme to defraud the New York State tax authority that allowed the defendant to undercut the plaintiff's prices
Holding that in order for a RICO plaintiff to have standing he must establish that his injuries were caused by a predicate act within the meaning of 18 U.S.C. § 1962
Holding that where there were variations in state laws precluding a single class of doctors alleging breaches of contract by health maintenance organizations that systematically underpaid physicians for their services, subclasses could be certified covering class members applying the same legal standards
Holding that an aggregate determination that “bears little or no relationship to the amount of economic harm actually caused” violates the Rules Enabling Act
Fed. R. Civ. P. 23 Cited 35,072 times 1237 Legal Analyses
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"