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Mr. Jun Oh
Ph.D. Candidate in Accounting
Johnson Graduate School of Management
Cornell University

This study examines whether antitrust risk affects firms’ disclosure of mergers and acquisitions (M&As). Due to regulatory exemptions, deals that fall below a size threshold escape formal antitrust scrutiny at the time of the merger. These “non-reported” deals can have important implications for the firm’s pricing power of its products in segmented and localized markets. I hypothesize that firms face a trade-off between the benefits of disclosing these deals to capital markets (i.e., capitalize the product market benefits into stock prices in a timely manner) and the potential antitrust scrutiny the voluntary disclosure can invite, which increases the probability of agencies challenging the merger. Exploiting two quasi-exogenous variations in antitrust enforcement that affect the level of antitrust risk, I find evidence of acquirers strategically managing their disclosure of horizontal and intrastate deals in a way that minimizes antitrust risk. Collectively, my findings shed light on a new determinant of voluntary disclosure: the risk of costly antitrust enforcement.