Private equity firms (PE firms) have become common owners of established firms in concentrated markets. We show that the threat of a PE acquisition can trigger incumbent mergers in an otherwise mergerstable industry. This can help antitrust authorities maximize consumer surplus because...

We provide the first estimates of the extent of common ownership of competing firms in Australia. Combining data on market shares and substantial shareholdings, we calculate the impact of common ownership on effective market concentration. Among firms where we can identify at least one owner, 31...

The question of whether and how partial common-ownership links between strategically interacting firms affect firm behavior has been the subject of theoretical inquiry for decades. Since then, consolidation and increasing concentration in the asset-management industry has led to more pronounced...

As is well known among financial economists but not previously recognized within the antitrust community, large and diversified institutional investors such as BlackRock, Fidelity, State Street, and Vanguard collectively own roughly two-thirds of the shares of publicly traded U.S. firms overall,...

We study how family ownership shapes the firms' likelihood of being involved in antitrust indictments. Using data from Italy, we show that family firms are significantly less likely than other firms to commit antitrust violations. To achieve identification, we exploit a law change that made it...

The large increase in common institutional ownership raises significant antitrust concerns, even if the precise channel of any potential influence on market outcomes is unclear. Using a novel dataset on shareholders’ board representation, we examine the role of common institutional directors...