Staff: Class Action

Key Staff

Gary L. French

Principal Consultant

Dr. French has 30 years of experience as an expert economist in litigation and regulatory proceedings, and has testified before federal and state courts on more than 50 occasions. He has provided expert testimony in various kinds of litigation, including antitrust, bankruptcy, contract, employment...

Eric Fruits

Principal Consultant, Pacific-Northwest Region

Dr. Eric Fruits is an economics, finance, and statistics expert based in Portland, Oregon and directing the firm’s work in the Pacific-Northwest region. Dr. Fruits has produced numerous research studies involving economic analysis, financial modeling, and statistical analysis, and provides expert ...

Eric Goldstein

Senior Economist

Eric Goldstein has extensive experience conducting economic and statistical analyses in complex litigation.  Mr. Goldstein has worked on a variety of cases including antitrust, patent infringement, and contract disputes, on behalf of direct and indirect purchaser classes, individual and...

Todd V. Hasson

Managing Economist

Todd Hasson is a CFA® Charterholder with more than 20 years of experience providing financial and economic analysis to parties involved in disputes, investigations, and negotiations. He has testified at deposition on lost profit damages and forgone investment opportunities. Mr. Hasson has submitted...

Marianne Ley Hayek

Managing Economist

Marianne Ley Hayek has applied her economic expertise to a wide range of litigation, covering such matters as antitrust, breach of contract, patent infringement, and wage discrimination. Her specialties include evaluating tacit collusion practices, defining markets, and calculating damages. Ms....

Robert S. Knudsen

Vice President

Mr. Knudsen has 34 years of experience in auditing, management consulting, reorganization and workout consulting, business valuation, investigative accounting, and analysis of financial and business issues in commercial litigation. He has testified many times in state and federal courts, at...

Chi Leng

Principal Consultant

Dr. Leng, a Principal Consultant to Nathan Associates, specializes in antitrust class actions and damage analysis. Her experience includes research pertaining to class certification, analysis of pricing behavior, and evaluation of allegations of collusion, bid rigging, and market allocation. Her...

Russell W. Mangum III

Senior Vice President, Litigation Services

Dr. Mangum has over 15 years experience in economic research and analysis. He has served as a consulting and testifying expert in the private sector and for local, state, and federal governments. His practice focuses on economic analysis and expert testimony in a wide range of matters involving...

Maggie Pagel

Senior Economist

Maggie Pagel has over 7 years of economic analysis experience across domestic litigation and international development projects. Maggie specializes in data management, interpretation and analysis for large and complex datasets, enabling her to combine quantitative results with qualitative research...

Eileen Reed

Principal Economist

Specializing in applied microeconomics and financial analysis of antitrust, health care, regulatory, and general business issues, Eileen Reed has worked in the United States and Europe managing complex projects, litigation, and merger reviews from their inception to completion. Ms. Reed has...

Jonathan Schwartz

Vice President, Litigation

Mr. Schwartz is an economist with more than 10 years of litigation consulting experience.  His work has covered a broad range of matters including antitrust, finance, intellectual property, international arbitration, and contract disputes.  Mr. Schwartz has performed analysis related to antitrust...

Lakhbir Singh

Board Member

Former CEO and now a member of the board, Dr. Singh specializes in the development and assessment of damages models for complex commercial and antitrust litigation. In more than 30 years as a consulting economist, Dr. Singh has conducted damages studies involving many different industries, most...

Chen Song

Senior Vice President, Litigation

Dr. Song is an economist, CFA charter holder, and expert witness. Since receiving her Ph.D. in economics from the University of Chicago, she has provided consulting and expert testimony in single-plaintiff, multiple-plaintiff, and class action discrimination disputes, as well as class action wage...

Ram Tamara

Vice President and Senior Economic Adviser; Acting Executive Director, Nathan India

Dr. Tamara, a Nathan Associates vice president and the firm's senior economic adviser, is an expert in industrial organization as well as behavioral and financial economics. He also serves as acting executive director of Nathan’s Indian subsidiary, Nathan Economic Consulting India Private Ltd. (...

Douglas Young

Principal Consultant

Mr. Young specializes in applying financial, economic, and statistical analyses to estimate damages in complex business litigation. He has provided expert testimony regarding economic damages in commercial dispute, consumer fraud, antitrust, bankruptcy, and investment suitability and trust fund...




Academic Affiliates

Martin Asher

Principal Consultant

Martin Asher is a Principal Consultant and expert witness at Nathan Associates. He has provided expert testimony in antitrust cases involving allegations of price fixing and market allocation, has analyzed class certification issues, and constructed damage models in a variety of cases covering a...

Mark A. Cohen

Academic Affiliate, Nathan Associates Inc.; Professor of American Competitive Enterprise and Professor of Law, Vanderbilt University

For nearly 30 years, as a consulting expert, Professor Cohen has been hired by both plaintiff and defense counsel to testify in both state and federal court on a wide range of economic issues in complex class action litigation including class action certifications, liability, damages, and class...

William R. Latham, III

Associate Professor, Department of Economics, University of Delaware

Dr. Latham has testified as an expert witness in litigation involving patent and trademark infringement, antitrust, employment, breach of contract, and other cases in federal and state courts. On issues involving electric utilities, he has testified before the Federal Energy Regulatory Commission...

John Pisarkiewicz

Principal Consultant

Dr. Pisarkiewicz has more than 30 years of experience serving as an expert economist before federal and state courts, administrative tribunals, and arbitration panels. He started at Nathan Associates in 1985, then rejoined the firm after a five-year hiatus as senior vice president at Heiden...

John L. Solow

Professor, Department of Economics, University of Iowa

Dr. Solow has been a visiting lecturer or professor at Stanford University and the University of Auckland. He is the author of articles in scholarly economics journals, including the American Economic Review, Economica, the Journal of Public Economics, and the Southern Economic Journal, and serves...

David A. Walker

John A. Largay Professor of Finance and Director Emeritus Capital Markets Research Center, School of Business, Georgetown University

Before joining the faculty at Georgetown University, Dr. Walker served on the faculties of Northwestern University and the Pennsylvania State University and was a research scientist at George Washington University. He also held professional positions with the Federal Deposit Insurance Corporation,...

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