It’s really a very difficult thing to do — and query whether it’s worth the effort. See, e.g., The Apple iPod iTunes Antitrust Litigation, 2014 U.S. Dist. LEXIS 136437 (N.D. Cal. Sept. 26, 2014) (Gonzalez Rogers, J.) (denying Daubert motions all around). At least that’s true when the economist is a well-known professor at a major university.
The iPod litigation is, by the way, quite interesting . . . the court has refused to grant Apple summary judgment on the claim that an iTunes update caused consumer lock in. In an earlier summary judgment order, the court found a triable issue of fact as to whether iTunes update 7.0 was a genuine product improvement so as to not be anticompetitive.