In Corona Regional Medical Center v. Sali, No. 18-1262 (May 3, 2019), the Supreme Court recently dismissed a petition for a writ of certiorari that would have resolved a circuit split as to whether expert testimony must be admissible to be considered at the class certification stage.  As a result, the Ninth Circuit remains one of only two circuits that have ruled workers are not required to submit admissible evidence to support a motion for class certification.  In contrast, the Second, Third, Fifth, and Seventh Circuits have all held that expert testimony must be admissible to be considered at the class certification stage.
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