DOJ Antitrust Boss Vows Scrutiny of Tech Giants’ Data Practices

The U.S. Justice Department’s top antitrust enforcer said data collection practices of technology companies can raise competition concerns, the latest warning directed at the industry amid a broad investigation of its biggest companies.

Makan Delrahim, the head of the antitrust division, said Friday in a speech at Harvard Law School that the department is paying close attention to the ways data can enhance market power. Amassing huge amounts of data can further entrench dominant companies at the expense of emerging competitors, he said.

“Antitrust enforcers cannot turn a blind eye to the serious competition questions that digital markets have raised,” ...