Class Action Expert Witnesses

Class action expert witnesses and consultants listed here may be able to form expert opinions, draft expert witness reports, provide expert witness testimony at deposition and/or trial as or serve as consulting (non-testifying) experts on class action. The class action expert witness listings on this page are typically from fields/areas of expertise such as: Advertising, Business Damages, Computers, Cybersecurity, Economics, Insurance, Marketing, and Statistics.

Eric Forister, PhD Econ One Research, Inc.

Los Angeles, California
Economics, Business Damages - Damages, Lost Profit, Reasonable Royalty, False Advertising, Consumer Fraud, Class Certification, Class Action, Market Power, Market Definition, Patent, Survey, Valuation.
Dr. Eric Forister is an expert economist with testifying experience on market definition, market power, and damages. His expertise includes applying advanced statistical techniques to datasets, synthesizing information from documents, and designing and evaluating surveys. He focuses on relevant questions to tackle complex issues with an efficient and effective style of communication. Dr. Forister also has extensive experience consulting on issues including royalty rates, irreparable harm, sampling, survey design, common impact, and materiality. He is a Senior Economist at Econ One and can be reached for more information upon request. Learn more at www.econone.com/staff-member/eric-forister.

John Horst, CISSP®-ISSAP® Xanesti Technology Services, LLC

San Diego, California
Computers, Cybersecurity - Computer, Digital Forensics, Discovery, Databases, Class Action, Hacking, Breach, Encryption Safe Harbor, Health Care Data, Digital Medical Records, HIPAA, PII
John Horst, CISSP®-ISSAP®, is the Managing Member for Technology and Innovation for Xanesti Technology Services, LLC. John has provided expert information technology consulting across several lines of business such as pharmaceutical development, medical billing, general liability insurance, clinical laboratory systems, mortgage financing, and automotive aftermarket products. John has provided cybersecurity engineering, software development, installation and training, and troubleshooting for 11 years in support of multiple U.S. Navy programs of record, including programs operating at both unclassified and secret levels. John maintains an active national security clearance at the SECRET level. John has taught information technology courses for the University of Phoenix (San Diego and Online campuses) and Coleman University (San Diego) where John pioneered the development of computer game software development instruction, now a core part of the Coleman curriculum. John has also ta...

Michael Trousdale, PhD Econ One Research

Los Angeles, California
Economics, Business Damages - Damages, Personal Injury, Wrongful Death, Medical Malpractice, Discrimination, Employment, Antitrust, Market Power, Market Definition, Class Action, Class Certification, Economic Analysis, Econometric Analysis, Economic Consulting
Dr. Michael Trousdale is a managing director at Econ One Research with over 15 years of experience conducting and managing complex economic research. As an economic expert, Dr. Trousdale applies economic and statistical analysis to liability and damages estimation for litigation matters. He has consulted on behalf of both plaintiffs and defendants across a wide array of industries and products, including professional sports, commercial real estate, steel products manufacturing, air & surface transportation, oil & gas, electricity, pharmaceuticals, radio equipment, and a variety of others.

Philip J. Cross, Ph.D. Kenyon Consulting LLC

Washington, District Of Columbia
Economics, Statistics - Lost wages, Antitrust, Class action, Lost profits, Breach of contract, Damages, Liability, Survey design, Conjoint analysis, Big data, Machine learning, Privileged consulting, Discrimination, Wrongful termination, Wrongful death, Industrial espionage, Fraud detection, Employment discrimination
Dr. Cross has over 20 years of experience as an economist and statistician in academia, government, and consulting. His consulting experience includes testifying as an expert in class-action litigations, antitrust matters, lost profits matters, and employment discrimination matters. Dr. Cross holds a Ph.D. from the University of Wisconsin. He previously taught in the Economics Department at Georgetown University, and has held visiting positions at Johns Hopkins University and the University of Melbourne. Dr. Cross’s experience includes: Being retained as an economic and statistical expert in litigation matters in both U.S. District courts and state courts. He has opined in antitrust, class action, employment discrimination, breach of contract and regulatory matters. Working on litigation matters involving antitrust issues, class certification, statistical sampling, survey design, conjoint analysis, health-care reimbursement, wage and hour cases, product liability, economic dama...

Brian Sowers, MBA Applied Marketing Science, Inc.

Burlington, Massachusetts
Marketing, Advertising - Survey research, Lanham Act, trademark infringement, trade dress infringement, likelihood of confusion, dilution, secondary meaning, genericness, false/deceptive advertising, class action, Intellectual property
Federal and state level qualified consumer survey expert with 30 years market research experience. Principal at Applied Marketing Science, Inc., a full-service market research and consulting firm. Mr. Sowers has served as a testifying expert and submitted reports to Federal and State Courts, as well the Trademark Trial and Appeal Board, in a variety of litigation matters on behalf of plaintiffs and defendants. He has personally designed and conducted thousands of market research surveys across a broad range of modalities and a broad range of populations. Mr. Sowers hosts an annual CLE accredited webinar on survey evidence in Intellectual Property and serves as an editor for The Trademark Reporter. His expert services include survey design, implementation and analysis, expert report preparation, critique of opposing expert reports, expert testimony, guidance on the deposition and trial questioning of opposing expert witnesses.

Tao Sun, Ph.D. Applied Marketing Science, Inc.

Burlington, Massachusetts
Marketing, Advertising - Trademark and Trade Dress Infringement (Likelihood of Confusion, Secondary Meaning, Dilution, Genericness), False and Deceptive Advertising, Class Action, Expert Witness Testimony, Marketing and Survey Research 
Tao Sun is a manager and testifying survey expert in the Litigation Support practice at Applied Marketing Science, Inc. (AMS). He provides survey evidence and expert testimony on matters related to trademark and trade dress infringement, false and deceptive advertising, and class action litigation. In addition, his expert services include critiquing opposing expert reports, and guiding the deposition and trial questioning of opposing expert witnesses. In his role at AMS, Dr. Sun is involved in all aspects of litigation research, including survey and sample design, data analysis, and expert report preparation. With over 20 years of teaching and research experience, Dr. Sun has designed and conducted various surveys and experiments related to consumer behavior, advertising effectiveness, and mass media effects. His research findings have been published in outlets such as the Journal of Consumer Behavior, Journal of Advertising Research, Psychology & Marketing, among others. Dr. Sun ...

Patricia Yanes Applied Marketing Science, Inc.

Burlington, Massachusetts
Marketing, Advertising - Conjoint Analysis, Class Action, Class Action Lawsuits, Class Action Damage Models, Class Action Litigation, Class Certification, Economic Damages, Market Research, Marketing, Survey Design, Survey Research, Damage Calculations, Damages
Patricia Yanes serves as an expert witness for civil litigation, with a specialty in on conjoint analysis and discrete-choice methodologies for class actions. She has led domestic and international market research engagements for over a decade as a Principal at Applied Marketing Science, Inc. (AMS). Her litigation research experience includes supporting affiliated academic experts in the design and execution of high-stakes consumer litigation, and in preparing rebuttals. She has managed projects with testifying experts on cases related to deceptive advertising, class actions, patent infringement and more. Patty is a master of conjoint analysis, maximum-difference scaling (MaxDiff), total unduplicated reach and frequency (TURF), and choice-modeling techniques. Patty is a member of the American Association for Public Opinion Research (AAPOR), the Institute for Operations Research and Management Science (INFORMS), the Insights Association (IA), and Women in Research (WIRe). She has gu...

Gary S. Barach, CPA, CFE, CFF, CVA BCG Forensics, LLC

West Chester, Pennsylvania
Business Damages, Economics - fraud, business valuation, business interruption, lost profits, product recall, personal injury, employment cases, discrimination, contract disputes, dispute resolution, economic damages, construction defects, insurance claims, class action, shareholder disputes, bankruptcy, commercial litigation.
Gary S. Barach, CPA, CFE, CFF, CVA, is the founder of Barach Consulting Group, LLC (f/k/a Barach & Company). The firm was established in 1976. He has been retained as a financial forensic and economic expert in over 3,800 cases. His experience in litigation includes business valuation; fraud investigation; bankruptcy; and determining economic damages arising from contract and shareholder disputes, recalled product, and construction defects. Mr. Barach is also a well established expert in economic damages arising from personal injury and discrimination litigation. Mr. Barach’s professional credentials include Certified Public Accountant (CPA), Certified Fraud Examiner (CFE), Certified Valuation Analyst (CVA), and Certified in Financial Forensics (CFF). He has been qualified as an expert in federal, state, and local courts throughout the United States and has never been precluded from offering testimony as the result of a Daubert motion. Mr. Barach’s 40 years of experience include...

Mark A Anderson, SCLA, AIC, AIM, AIS, CCI Anderson Claim Consulting, LLC

Ninety Six, South Carolina
Insurance - Bad Faith, Coverage, P&C Claims, Commercial Property Claims, Personal Property Claims, Best Practices, Exclusions, Denials, E&O Claims, Class Action, Extracontractual, Catastrophes, Hurricanes, Fraud, SIU, Subrogation, Commercial Auto Claims, P&C Operations
I began my career as an adjuster trainee and worked through every operating level within Claims. As VP of Property, Auto and Liability claims at Liberty Mutual for 36 years and AVP of Commercial Property, Auto and Agribusiness claims with Nationwide for 8 years, I was responsible for Claims operations nationwide. I partnered with defense, coverage and bad faith counsel in the review and oversight of coverage disputes and bad faith litigation. Throughout my career, I have been responsible for the handling, management and leadership of PL and CL Property and Auto claims, field operations along with technical oversight, including the development and implementation of Claim Handling Guidelines "Best Practices". I am extremely familiar with coverage interpretation, best claim practices, bad faith situations, limits, exclusions, claim procedures and building construction issues. As a P&C Insurance claim consultant, I work for both plaintiffs and defendants. I am currently available as...

Rhonda Harper, MBA Harper Litigation Consulting and Research

Dallas, Texas
Marketing, Advertising - Survey Research (Lanham Act - Likelihood of Confusion, Secondary Meaning, Genericness, Fame, Dilution, Advertising), Class Action, Intellectual Property, Consumer Behavior, Misappropriation of Image, Licensing, Deceptive Trade Practices, Fraudulent Business Practices, Class Action, Rebuttals
RETAINED BY 200+ LAW FIRMS. COURT PROVEN. Ms. Harper has over 30 years’ experience and is one of the few experts who is court qualified across many matters. As a former chief marketing officer for Fortune 500 companies, general manager for a leading global communications agency, serial entrepreneur, and an adjunct marketing professor, she has been engaged by hundreds of law firms in cases regarding intellectual property infringement, misleading advertising, licensing, breach of contract and performance, unfair competition, trade practices, consumer privacy, and standard practices. She has also been a designated expert in more than ten class action lawsuits. As a leading survey expert, Ms. Harper has conducted or rebutted more than 200 Lanham Act trademark, trade dress, and advertising surveys. Since 2005, Ms. Harper has testified more than 100 times in virtually every Federal Circuit Court, along with State Courts, USPTO, TTAB, and in arbitrations through both AAA and JAMS. 2023 C...

Gila Bronshtein, PhD EconMetrics

Vancouver, Washington
Economics, Business Damages - Antitrust, Class action, Trademark Infringement, Intellectual Property, Consumer Fraud, Lost profits, Damages, Discrimination, Statistical Sampling, Class Certification, Contract Dispute, Liability, Wrongful Termination, Personal Injury, Data Security, Data Breach, Wrongful Death, Forensic Economics
Dr. Bronshtein earned her PhD in Economics from Stanford University, paving the way for her notable career in economic litigation. At Cornerstone Research, Dr. Bronshtein has honed her skills in litigation support and expert witness services. Over her career, Dr. Bronshtein managed over 25 expert witness projects in a variety of industries, including tech, automotive, consumer products, and pharmaceuticals. Her profound insights and strategic approach have been pivotal in numerous legal disputes related to product liability, false advertising, data privacy, competition, antitrust, contract disputes, patent or trademark infringement, and discrimination lawsuits. Learn more at www.econ-metrics.com