Dr. Tillmann specializes in the application of microeconomics, econometrics, and statistical methods to litigation matters, government investigations, and strategy assignments. He has managed case teams and conducted analyses in antitrust and health care litigation matters across a range of industries, including pharmaceuticals, health care providers and payers, social media, cable television, consumer electronics, automobiles, airlines, and chemical products.

These analyses have included damages analysis, merger simulation, and quantitative modeling. In merger investigations, he has supported experts for the US Department of Justice (DOJ), the Federal Trade Commission (FTC), state attorneys general, and merging parties related to horizontal and vertical transactions. Dr. Tillmann’s research has appeared in the Journal of Competition Law & Economics and the American Journal of Political Science. He has taught economics to undergraduate and graduate students at The University of Chicago and the University of Rochester.