Guy ben ishai photo bio

Dr. Ben-Ishai has extensive expertise in competition, securities, and product liability matters. Prior to joining The Brattle Group, he completed three years of distinguished public service as a senior government official and the Chief Economist at the New York State’s Attorney General’s Office. As Chief Economist for the Office, Dr. Ben-Ishai successfully led the economics work of the agency in a number of high-stakes, high-impact cases. These include a consummated merger challenge where he testified on disgorgement of ill-gotten gains; a product hopping monopolization lawsuit in the pharmaceutical industry; a securities investigation involving climate change risk disclosure; and a consumer fraud matter related to the sales of diesel vehicles equipped with defeat devices.

Earlier in his career, Dr. Ben-Ishai served as a private consultant in both testifying and consulting roles. He advised clients on a wide range of antitrust matters relating to monopolization, price-fixing conspiracies, mergers, and damages. He was also a Visiting Fellow at the Milken Institute in California and a Visiting Scholar at the University of Toulouse in France.

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