Summary: Economics Expert Witness testimony is not allowed because the plaintiff did not show that the expert’s adoption of the ADT Model and Mangum’s Representative Industry Model was reliable.
Facts: This case (ADT LLC, et al. v. Vivint Smart Home, Inc., et al – United States District Court – Southern District of Florida – May 19th, 2023) involves numerous claims: unfair competition in violation of the Lanham Act, common law unfair competition, trade slander/commercial disparagement, and tortious interference with advantageous business relationships. The plaintiff, ADT, alleges that the defendant, Vivint Smart Home misled ADT customers through false sales tactics, such as switching out ADT equipment for Vivint and by telling the customer that ADT has been bought out and vivid is taking over their accounts. The plaintiffs hired Economics Expert Witness Dr. Eric Matolo to provide testimony their behalf. The defendant filed a motion to exclude this expert from providing an expert witness opinion.