Dr. David Tabak

Managing Director


New York City
Tel: +1 212 345 2176
Fax: +1 212 345 4650

Email: david.tabak@nera.com
vCard: Download


PhD and MA in economics, Harvard University
BS in economics and BS in physics, Massachusetts Institute of Technology


At NERA, Dr. Tabak is a member of the Securities and Finance Practice. In the area of securities class actions, Dr. Tabak has testified on topics including class certification, liability, materiality, affected trading volume, and damage calculations in cases with allegations such as improper valuations, accounting irregularities, and merger disputes. He has also testified on valuations of equity, financial derivatives, fixed-income instruments, businesses, and litigation settlements. Dr Tabak was commended in Who’s Who Legal Arbitration Expert Witness Guide 2016 for his testifying experience as an expert witness.

Dr. Tabak has been retained as an expert to address issues including allegations of valuations, contract disputes, commercial damages, and disputes between brokers and customers. Dr. Tabak has appeared as an expert in state, federal, and bankruptcy court, and before arbitration panels, including the National Association of Securities Dealers (NASD), the American Arbitration Association, the International Dispute Resolution Centre, and the International Chamber of Commerce International Court of Arbitration. His non-litigation work has included developing a risk-scoring model for a reinsurance company, assisting financial institutions in new product development, analysis of potential insider trading for a financial institution, and interpretation of statistical analyses of treatment effectiveness for a program for at-risk youth.

Dr. Tabak earned his PhD and MA degrees in economics from Harvard University and his BS in economics and BS in physics from the Massachusetts Institute of Technology. While at Harvard, Dr. Tabak participated in teaching courses in micro- and macroeconomics and American economic policy at the undergraduate and graduate levels, and in the creation of an undergraduate textbook and accompanying software package.

Dr. Tabak has published in his areas of expertise in forums such as St. John's Law Review and Shannon Pratt's Business Valuation Update, and has published peer-reviewed articles in Litigation Economics Review and the Journal of Forensic Economics. Dr. Tabak is also the author of book chapters and has served as a member of BV Q&A Update's expert author panel and as a referee for peer-reviewed journals. His publications have covered topics such as commercial disputes, economic analysis of market efficiency, valuation discounts for lack of marketability, and the application of statistics in litigation analyses. Dr. Tabak has been an invited speaker at the Securities and Exchange Commission and a presenter at forums that provide continuing legal education credits or continuing professional education credits for appraisers.