WWL Expert Witnesses: Commercial Litigation 2022


Who’s Who Legal recognises Cornerstone Research consultants for their wide-ranging experience in complex litigation proceedings, across a variety of industries.

LondonWho’s Who Legal named Rahul Guha, David F. Marcus, Andrew D. Richmond and Andrea Shepard to its 2022 global list of Expert Witnesses in the commercial litigation space.

Selected for their work across a range of legal issues, the following consultants were recognised for their expertise and experience advising on some of the world’s most significant matters:

  • Rahul Guha is CEO of Cornerstone Research, based in the firm’s Chicago office. Dr Guha leads an international team of professionals dedicated to supporting clients and experts in a range of complex litigation challenges. He has twenty-five years of experience applying economic analysis to a wide range of high-profile antitrust, intellectual property and alleged product misrepresentation cases.
  • David F. Marcus is a senior vice president, based in the firm’s Boston office. Dr Marcus has more than twenty-five years of experience providing consulting services and expert testimony in litigation involving economic and financial issues. His primary areas of focus are securities litigation, valuation, cases involving financial institutions and white collar litigation.
  • Andrew D. Richmond is a senior vice president, based in the firm’s Chicago office. Mr Richmond has over thirty years of litigation consulting and expert witness experience. He has testified on the topics of forensic accounting, fraud and concealment schemes, valuation, loss causation and economic damages in a wide variety of commercial disputes.
  • Andrea Shepard is a senior adviser to Cornerstone Research. Dr Shepard directs analyses for large, complex antitrust litigation and merger reviews. She is the former co-head of Cornerstone Research’s antitrust and competition practice and an emeritus professor at the Stanford Graduate School of Business.

Who’s Who Legal draws on the recommendations of clients and private practitioners to identify the foremost experts in a wide range of practice areas around the world.


  • Chicago

Rahul Guha

Chief Executive Officer

  • Boston

David F. Marcus

Senior Vice President

  • Chicago

Andrew D. Richmond

Senior Vice President

  • San Francisco

Andrea Shepard

Senior Advisor


Carine Campbell
Cornerstone Research
+44 20 3655 0907