ORDER
This is а product liability action brought against eight drug manufacturers, four of whom have been served. Plaintiff Mary Morton 1 alleges that she contracted vaginal adenosis as a result of her mother’s use of *595 the drug diethylstibestrol (DES) while plaintiff was in útero. Plaintiff does not allege which drug company manufactured the pills taken by her mother. See Amended Complaint ¶ 32. Rather, she alleges that the defendant drug companies manufaсtured a substantial share of the DES pills produced during the period in question, and argues various theories to support liability without the necessity of proving which company manufactured the pills in question. Defendants do not deny that they manufactured the drug DES during the period in question. Instead, they state, by motions for summary judgment, that at least 149 drug companies manufactured DES during that period, any one of which might have produced the pills taken by plaintiff’s mother. Plaintiffs have responded to the motions for summary judgment, and have documented their response by filing a certified transcript of portions of the deposition testimony of Dr. Don Carlos Hines, taken in Bichler v. Eli Lilly and Co., Index No. 15600/74 (Sup.Ct.Bronx County, New York).
The motions for summary judgment were heard by the Court. At hearing, which was attended by plaintiffs Mary T. and David M. Morton, cоunsel for plaintiffs filed a motion to continue the hearing and a motion to withdraw. The proceedings were reported, and are available for transcription if required. For the reasons stated at hearing, the motions to continue and withdraw were and are DENIED.
The issue raised in the motions for summary judgment is whether these defendants may be held'liable without proof that оne, or indeed any, of them manufactured the pills that caused plaintiff’s injury. Plaintiff argues that this issue cannot be decided at the summary judgment stage, as its determination raises contested questions of fact. A motion for summary judgment is to be granted if the pleadings, discovery, and the documentation supporting the motion reveal no “genuine issue as to any material fact and that the moving party is entitled to a judgment as a matter of law.” Fed.R.Civ.P. 56(c). A properly supported motion for summary judgment cannot be resisted on mere allegations alone; such a motion “pierces” the pleadings and tests whether the factual dispute is “genuine.”
Joe Regueira, Inc. v. American Distilling Co.,
Plaintiff in a product liability action must ordinarily prove that a manufacturer defendant produced the product that allegedly caused the injury.
See
Restatement (Second) of Torts §§ 402A, 433B (1965);
W. Prosser, The Law of Torts
§ 98 (1971). Florida has expressly adopted the doctrine of strict liability in tort as formulated in the Second Restatement of Torts, § 402A.
West v. Caterpillar Tractor Co.,
Plaintiff relies on several legal theories in support of her argument that recovery is available without proof of which drug company аctually manufactured the pills in question. The first two theories concern joint torts: plaintiff would establish the liability of several companies jointly under the “concert of action” or “enterprise liability” theories, thereby entitling her to recover from those joined as defendants. The requirement of causation remains intact under these theories. The last two, howеver, are novel theories of causation rather than of joint liability: plaintiff argues that the Court should overlook the flaws in traditional causation under either the theory of “alternative liability” or that of “market share.” Each of these four theories will be discussed below.
*596 A. Concert of Action.
Relying on the concert of action theory of joint tort liability, plaintiffs would hold these severаl defendants liable for having acted in concert with each other and other drug manufacturers in causing her injury. Specifically, plaintiffs allege that the drug companies acted in concert “in the testing, manufacturing, distribution, promoting, marketing and sale of DES and the dissemination of literature regarding DES to practicing physicians.” Amended Complaint ¶ 26. Further, plaintiffs allege that defendants are liable for manufacturing and selling DES “with identical chemical constituency by a mutually agreed-upon formula,” thereby enabling the marketing of DES as a generic drug and preventing consumers from identifying the manufacturer. Id. ¶ 27.
The concert of action concept is generally accepted in the courts of this country, and has been embraced by the Suрreme Court of Florida for years.
See Symmes v. Prairie Pebble Phosphate Co.,
All those who, in pursuance of a common plan or design to commit a tortious act, actively take part in it, or further it by cooperation or request, or who lend aid or encouragement to the wrongdoer, or ratify or adopt his acts done for their benefit, are equally liable with him.
Prosser, supra
at 292 (footnotes omitted).
2
The classic example of such liability is the drag race:
A
and
B
are illegally racing when
A
injures
C. A
and
B
are jointly and severally liable because their concerted tortious conduct caused C’s injuries.
See, e.g., Skroh v. Newby, supra.
The parties have cited no Florida case setting out the elements of concert of action. The decisions that have been noted either do not apply the doctrine or apply it without discussion.
See, e.g., Insurance Field Services, Inc. v. White and White Inspection and Audit Service, Inc.,
Several courts have reviewed the concert of action theory in the course of deciding DES cases. In
Sindell v. Abbott Laboratories,
This Court agrees with the vast majority of courts that have considered the question: the DES manufacturers simply did not act in concert as that concept is defined in tort law.
3
Their filings with the Food and Drug Administration (FDA) did not represent concerted tortious conduct. In 1940, several companies filed wholly separate applications with the FDA to market DES. By these applications, the manufacturers sought to market DES for purposes
*597
unrelated to pregnancy.
4
The FDA rejected these several applications, requiring the companies to coordinate a single “master” filing of clinical data.
See Lyons, supra,
The activities of the manufacturers after the FDA began approving DES for use to prevent miscarriage also fail to suggest any concerted activity. There is simply no indication of any conduct that might conceivably raise an inference that a tacit understanding or common plan existed among DES manufacturers. 5 One argumеnt in this connection deserves special mention: plaintiffs assert that each manufacturer marketed DES according to the same chemical formula, and that this somehow grounds a charge of concerted conduct. DES, it can be said, is DES; the defendants could not market the active ingredient in DES according to any formula other than that prescribed in the Unitеd States Pharmacopoeia. 21 U.S.C. § 351 (1976).
The only DES ease to find liability on the concert theory is
Bichler v. Eli Lilly & Co.,
Accordingly, this Court concludes that the documents supporting the motion for summary judgment, including the deposition testimony of Dr. Hines, fail to raise a *598 genuine issue as to any fact material to the concert of action theory.
B. Enterprise Liability.
Like concert of action, plaintiff’s second theory — enterprise liability — would impose liability on each DES manufacturer on the basis of their group conduct. The concept of enterprise, or industry-wide, liability derives from Judge Weinstein’s opinion in
Hall v. Du Pont De Nemours & Co.,
The Hall court focused on the joint conduct of the defendants, finding that their joint control of the risk presented by their industry warranted the imposition of joint liability. 8 Id. at 371-76. The facts in this DES case in no way suggest application of Hall’s theory of joint liability. In Hall there were six manufacturers in the industry; hеre there were 149. Judge Weinstein limited his holding in Hall by warning against its application to a “decentralized” industry with many individual members. There was no industry-wide delegation of safety functions to a drug manufacturers’ trade association; indeed, if there was any body responsible for safety in the drug industry it was the Food and Drug Administration.
Accordingly, like the many other courts that have considered the question, this Court finds that the enterprise liability theory espoused in
Hall
cannot support liability in this DES case.
See, e.g., Ryan, supra
at 1017;
Namm v. Charles E. Frosst & Co.,
C. Alternative Liability.
The remaining two theories relate not to the joint conduct — and therefore joint liability — of defendants, but to the element of causation. The first of these causation theories, that of alternative liability, is based on several decisions, most notably
Summers v. Tice,
Where the conduct of two or more actors is tortious, аnd is proved that harm has been caused to the plaintiff by only one of them, but there is uncertainty as to which one of them has caused it, the burden is upon each such actor to prove that he has not caused the harm.
Restatement (Second) of Torts § 433B(3) (1965). Thus, in its classic application, the theory requires each hunter who negligently shot at plaintiff to prove thаt his bullet did not cause the injury. Failing such proof, both are liable. Summers v. Tice, supra.
The theory cannot apply in this DES case because plaintiffs, by their own admission, cannot show that one of the defendants caused the injury.
See
Amended Complaint ¶ 32. Indeed, the very court that developed
*599
this often useful theory has recognized that it cannot apply in a DES case in which all possible manufаcturers of the pills in question are not joined.
Sindell, supra,
D. Market Share.
The final theory urged by plaintiffs, termed that of market share, was formulated by the Supreme Court of California as an extension of its alternative liability doctrine. In Sindell, supra, a DES plaintiff asserted several theories in support of recovery despite her inability to prove which company caused her injury. After rejecting each of the three theories discussed above, the court adopted a novel— perhaps radical — means of allowing plaintiff to circumvent the element of causation.
The Sindell court held that plaintiff need only show that her condition was caused by the drug DES and that those companies joined as defendants produced a substantial share of the DES pills on the market when plaintiff’s mother took the drug. Upon such a showing, each defendant would be held liable according to its share of the market unless it could prove that it did not manufacture the pills in question. Thus, the California court shifted the burden just as it had in Summers v. Tice, supra, despite the possibility that no defendant caused the injury. The court based its holding on the “rough justice” of the result: the adjudication of many DES cases under this theory would assertedly lead to each manufacturer being responsible for that share of the total DES liability that is proportional to its share of the DES produced.
The market share theory unquestionably represents a radical departure from the traditional concept of causation. Plaintiffs argue at length that the development of product liability law in Florida suggest a loosening of the causation requirement, and therefore that Florida would adopt
Sindell.
Plaintiffs’ position is not advanced by their argument that Florida has adopted strict liability,
see
West,
supra,
and rejected the defense of contributory negligence in favor of the comparative negligence doctrine.
See Hoffman v. Jones,
Plaintiff also challenges Florida’s adherence to the causation requirement by citing a few Florida decisions permitting product liability plaintiffs to prove essential elements of their case by parol evidence,
see McCarthy v. Florida Ladder Co., 295
So.2d 707 (Fla.App.1974), or by the use of a variant of the doctrine of
res ipsa loquitur. See Cassisi v. Maytag Co.,
In deciding a diversity case, a federal court is bound to apply the law of the forum.
Erie Railroad Co. v. Tompkins,
Accordingly, this Court is of the opinion that defendants’ motions for summary judgment should be, and they are hereby GRANTED.
Notes
. David M. Morton joins his wife, Mary T. Morton, as co-plaintiff in this case.
. See also Restatement (Second) of Torts §§ 875, 876 (1979).
. The facts surrounding the FDA applications and the marketing of DES are taken from the deposition of Dr. Theodore G. Klumpp, Chief of the Drug Division of the FDA in 1941; the affidavit and depositiоn testimony of Dr. D.C. Hines, Lilly’s “medical monitor” for DES from 1940 to 1952; and the affidavit of Dr. Jerome M. Maas, a former Lilly employee. They have been verified by reference to court decisions in other DES cases, in which the same theory was raised by plaintiff. On a motion for summary judgment, the facts are, of course, viewed in the light most favorable to the opponent of the motion, the plaintiff.
. The applications made in 1940 and 1941 sought FDA approval for the marketing of DES to relieve symptoms of menopause, vaginitis, engorgement of the breasts, and excessive menstrual bleeding. Klumpp deposition at 29. Use of DES for purposes unrelated to pregnancy is apparently still permitted by the FDA.
See Payton, supra
. “[T]he history of stilbestrol, far from showing joint conduct, demonstrаtes an independent, competitive response to a widely acclaimed medical discovery, all under the regulatory supervision of the FDA.”
Ryan v. Eli Lilly & Co.,
.
Abel v. Eli Lilly & Co.,
. The
Bichler
court cites
Interstate Circuit, Inc. v. United States,
. Judge Weinstein went on, however, to discuss the policy basis for imposing liability on an entire industry under
Hall’s
circumstances: “[T]he entire blasting cap industry and its trade association provide the logical locus at which precautions should be taken and liability imposed.”
. The parties have cited no Florida case adopting this theory. The Court assumes without deciding that it would be applied in an appropriate case by the Florida courts.
. Sindell's holding is undoubtedly a radical departure frоm normal causation. In
Mizell v. Eli Lilly & Co.,
.
In Hardy v. Johns-Manville Sales Co.,
