fact-finding

Two minors brought suit against Merrell Dow Pharmaceuticals, claiming they suffered limb reduction birth defects because their mothers had taken Bendectin, a drug prescribed for morning sickness to about 17.5 million pregnant women in the United States between 1957 and 1982. Limb reduction defects occur in fewer than one birth out of every 1000. Scientists do not know the mechanism by which any teratogen causes such defects. The plaintiffs offered testimony from three groups of experts. One group proposed to testify to a statistical link between Bendectin ingestion during pregnancy and limb reduction defects based on reanalyses of published studies that had reported no such association. A second group proposed to testify that Bendectin causes limb reduction defects in humans because it causes such defects in laboratory animals. A third group proposed to testify based on the similarity of Bendectin's chemical structure to other drugs suspected of causing birth defects. The district court granted summary judgment to Merrell Dow after excluding the plaintiffs' expert testimony. The Ninth Circuit affirmed that decision. The Supreme Court granted certiorari, reversed, and remanded for consideration under Federal Rule of Evidence 702. On remand, the Ninth Circuit examined the affidavits and prior trial testimony of the plaintiffs' experts. None of the experts had studied the effect of Bendectin on limb reduction defects before being hired to testify in this or related cases. None had published his work on Bendectin in a scientific journal. The only review their work had received was by judges and juries. Plaintiffs' epidemiological experts made vague assertions of a statistically significant relationship between Bendectin and birth defects but did not state that the relative risk exceeded two. With the exception of Dr. Palmer, the remaining experts were willing to testify only that Bendectin is capable of causing birth defects. Dr. Palmer alone was willing to testify that Bendectin did cause the limb defects in each of the children, based on his review of the plaintiffs' medical records and his conclusion that Bendectin is a teratogen.

During a 1967 adjudicatory hearing conducted pursuant to section 742 of the New York Family Court Act, a judge in New York Family Court found that the twelve-year-old appellant had entered a locker and stolen one hundred twelve dollars from a woman's pocketbook. The petition which charged appellant with delinquency alleged that his act, if done by an adult, would constitute the crime or crimes of larceny. The judge acknowledged that the proof might not establish guilt beyond a reasonable doubt but relied on section 744(b) of the New York Family Court Act, which provides that any determination at the conclusion of an adjudicatory hearing that a juvenile did an act or acts must be based on a preponderance of the evidence. After a subsequent dispositional hearing, appellant was ordered placed in a training school for an initial period of eighteen months, subject to annual extensions of his commitment until his eighteenth birthday, six years in appellant's case. The Appellate Division of the New York Supreme Court, First Judicial Department, affirmed without opinion. The New York Court of Appeals then affirmed by a four-to-three vote, expressly sustaining the constitutionality of section 744(b). The Supreme Court noted probable jurisdiction.

In 1984 the divestiture of AT&T's local telephone business created seven regional service monopolies known as Regional Bell Operating Companies or Incumbent Local Exchange Carriers. More than a decade later Congress enacted the Telecommunications Act of 1996 which restructured local telephone markets and imposed duties on the ILECs to facilitate entry by competitive local exchange carriers through resale of services at wholesale rates, leasing of unbundled network elements, or interconnection of facilities. William Twombly and Lawrence Marcus filed suit in the United States District Court for the Southern District of New York on behalf of a putative class of all subscribers of local telephone and high-speed internet services from February 8, 1996 to the present. They named as defendants four consolidated ILECs: BellSouth Corporation, Qwest Communications International Inc., SBC Communications Inc., and Verizon Communications Inc. The complaint alleged that these ILECs conspired to restrain trade by engaging in parallel conduct to inhibit CLECs, including unfair agreements for network access, inferior connections, overcharging, and billing practices designed to sabotage CLEC customer relations. The complaint further alleged that the ILECs agreed not to compete against one another in their respective territories. This agreement was inferred from their common failure to pursue business opportunities in contiguous markets and from a statement by Qwest CEO Richard Notebaert that competing in another ILEC's territory might be a good way to turn a quick dollar but that does not make it right. The complaint asserted that in light of the absence of meaningful competition among the ILECs and their parallel course of conduct the defendants had entered into a contract combination or conspiracy to prevent competitive entry and to allocate customers and markets. The district court dismissed the complaint for failure to state a claim. It concluded that the alleged parallel behavior was fully explained by each ILEC's independent interest in defending its own territory and that the complaint did not allege facts suggesting the decision to refrain from competing elsewhere was contrary to the ILECs' apparent economic interests. The Court of Appeals for the Second Circuit reversed, holding that plus factors need not be pleaded and that allegations of parallel conduct suffice if they leave open the possibility of collusion. The Supreme Court granted certiorari to address the proper standard for pleading an antitrust conspiracy through allegations of parallel conduct.