Dean A. Schiffman, Ph.D., is an expert in statistics, economics, econometrics and probability. Dr. Schiffman is also an attorney able to conduct cross examination in these same areas.

Dr. Hayter provides expertise in the areas of statistical analysis, econometrics, and mathematics for businesses, law firms, insurance companies, government departments, educational institutions, and non-profits.  He works for both plaintiff and defense attorneys.  He has been admitted as an expert witness in the areas of statistics and mathematics in courts in the United States.  With excellent quantitative, technical and communication skills, Dr. Hayter provides balanced, objective, and impartial analyses with expert reports and trial testimony.

EW #557's experience includes providing economic damage assessments in over 130 cases. He has courtroom and deposition testimony experience in commercial and tort cases.

I specialize in income loss cases with little earnings documentation, using statistical database.

Litigation and regulatory support for telecommunications. QSI's industry experts include: economists, financial modelers, engineers, CPAs, and marketing and product development experts.

Expert witness experience in marketing and advertising, past Chairman of Advertising Research Foundation, 25 years experience advising Fortune 500 companies and advertising/public relations agencies. A rare combination of an expert who has both substantial experience as a senior executive and an accomplished academician. Particular expertise related to advertising/branding, intellectual property and market/survey research issues.