ACCC economic witness in Mastercard trial faces sustained questioning
By Saloni Sinha ( May 29, 2026, 08:17 GMT | Insight) -- An economist called by Australia's competition regulator faced sustained questioning in court in the country's landmark Mastercard antitrust case over whether his analysis of the payments company’s merchant agreements relied on assumptions that were never tested against actual market behavior. As economic evidence in the ongoing trial concluded in the Federal Court on Friday, an expert witness for the Australian Competition & Consumer Commission was pressed by Mastercard's lawyer on whether he had examined the company’s costs or assessed the relative efficiency of Mastercard and Eftpos for his analysis.An economist called by Australia's competition regulator faced sustained questioning in court in the country's landmark Mastercard antitrust case over whether his analysis of the payments company’s merchant agreements relied on assumptions that were never tested against actual market behavior....
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