Tully Lillis is an Economist with Compass Lexecon based in Oakland, CA. Prior to joining Compass Lexecon, Mr. Lillis received his B.A. in Economics with High Distinction from the University of California, Berkeley.

Mr. Lillis has worked on a wide variety of complex litigation matters involving class certification, market power and market definition, pro-competitive effects, and damages calculations for antitrust disputes. His case experience involves claims of pay-for-delay generic entry, collusion, intellectual property, and predatory and exclusionary conduct. He has also evaluated the competitive effects of proposed mergers and joint ventures and assisted in the presentation of these topics before the Department of Justice and the Federal Trade Commission. He has significant experience with complex data analyses, and has assisted in writing expert reports, and prepared experts for deposition and trial. Mr. Lillis has extensive experience in the pharmaceutical and health care industry, but his work has also covered payment systems, collegiate and professional sports, and electronics.