Arnd H. Klein is a manager at Cornerstone Research, based in the firm’s San Francisco office. Dr Klein provides economic analysis and expert support in all phases of commercial litigation. He applies sophisticated empirical methods to analyse competition issues in mergers and antitrust matters involving single- and multi-firm conduct. He has led teams to evaluate market definition, market power, liability and damages in a range of complex antitrust matters. Dr Klein also has experience with large, proprietary datasets, surveys, and machine learning methods. His industry experience includes tech, telecommunications, payment cards, healthcare, pharmaceuticals and transportation.