Mass tort and product liability expert witnesses

Expert class library · 6 classes

The causation, engineering and regulatory experts in MDLs and product cases: epidemiology, dose-response, specific causation, design defect, warnings and FDA practice.

Each class is defined by role and method, never by a person or a firm. Open one for what it is retained to answer, how its testimony is attacked under Rule 702, and the rulings, each read in the opinion.

Usually retained by plaintiffs

General-causation epidemiologist

Bradford Hill causation analysis · Weight-of-the-evidence review

Specific-causation physician

Differential etiology · Medical record review

Product design engineer

Alternative design analysis · Failure mode analysis

Retained by either side

Toxicologist (dose-response)

Dose-response assessment · Exposure reconstruction

Warnings and human factors expert

Warning adequacy analysis · ANSI Z535 standards review

FDA regulatory expert

Regulatory history review · Labeling change analysis

Recent rulings

The 12 most recent of 18 rulings in this practice, newest first. Each links to the free opinion on CourtListener and to the class it belongs to.

OutcomeCaseCourtExpert class
ExcludedIn re Onglyza (Saxagliptin) and Kombiglyze (Saxagliptin and Metformin) Prods. Liability Litig.93 F.4th 3396th Cir. 2024General-causation epidemiologist
Exclusion reversedAnderson v. Raymond Corp.61 F.4th 5057th Cir. 2023Product design engineer
ExcludedLancaster v. BNSF Railway Co.75 F.4th 9678th Cir. 2023Specific-causation physician
AdmittedHardeman v. Monsanto Co.997 F.3d 9419th Cir. 2021General-causation epidemiologist
AdmittedHardeman v. Monsanto Co.997 F.3d 9419th Cir. 2021Toxicologist (dose-response)
AdmittedKlingenberg v. Vulcan Ladder USA, LLC936 F.3d 8248th Cir. 2019Product design engineer
ExcludedHickerson v. Yamaha Motor Corp., U.S.A.882 F.3d 4764th Cir. 2018Warnings and human factors expert
LimitedJackson v. E-Z-Go Division of Textron, Inc.326 F. Supp. 3d 375W.D. Ky. 2018Warnings and human factors expert
AdmittedKirk v. Schaeffler Group USA, Inc.887 F.3d 3768th Cir. 2018Specific-causation physician
AdmittedWilliams v. Manitowoc Co.898 F.3d 6075th Cir. 2018Warnings and human factors expert
ExcludedWilliams v. Mosaic Fertilizer, LLC889 F.3d 123911th Cir. 2018Toxicologist (dose-response)
ExcludedHall v. ConocoPhillips248 F. Supp. 3d 1177W.D. Okla. 2017Toxicologist (dose-response)

Other practice areas

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The library summarises public decisions for orientation; it is not legal advice. Read the opinion before relying on any ruling. No individual expert is named.