Mealey's (October 5, 2017, 7:14 AM EDT) -- BOSTON — An expert witness can testify about the barter industry and how it operates but cannot give opinions on whether a jewelry-for-advertising deal between two companies was reasonable or met barter industry standards, as such statements amount to legal conclusions, a Massachusetts federal magistrate judge held Sept. 29 (Hearts on Fire Company, LLC v. CIRCA, Inc., No. 14-cv-11044, D. Mass., 2017 U.S. Dist. LEXIS 160872)....