Marianne Ley Hayek

Managing Economist


Master of Arts, Economics, University of California, Davis

Bachelor of Arts, Economics and Journalism, University of Wisconsin-Madison

T: (703) 516-7810

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. Hayek has managed large-scale litigation consulting projects in addition to providing expert analysis and testimony.

Ms. Hayek has testified on lost profits and reasonable royalty damages in patent infringement cases. Her work as a case manager includes overseeing projects to assess damages from alleged anticompetitive actions involving computer software and operating systems, and to analyze the pricing structure of prescription brand-name pharmaceuticals in response to allegations of industry-wide price fixing. Her case-management portfolio in healthcare also includes analyzing the effects of vertically integrated physician-hospital organizations, barriers to entry, and physician concentration.

She has testified to the validity of statistical sampling techniques in breach of contract cases, and identified statistical patterns in wage data for a discrimination suit.

Ms. Hayek is a gifted educator and communicator, having directed the Master’s in Applied Economics Program at the University of Maryland, College Park. As a volunteer serving high-risk students in Baltimore city schools, she developed a math curriculum for 9th–12 graders. Ms. Hayek’s volunteer service also included work as an economics and communications consultant for development efforts in Baltimore.

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Applied microeconomics, industrial organization, game theory, public finance

Selected Publications & Presentations

Expert Communication, in Illinois Bar Journal, December 2001

Damages and Intellectual Property Litigation, for the Minnesota Institute of Legal Education, April 1996

Patent Damages after Polaroid, in Intellectual Property, a publication of the Illinois State Bar Association, May 1994


Sedona Conference Working Group on Patent Damages and Remedies

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