Assistant Attorney General Makan Delrahim, chief of the Justice Department’s Antitrust Division, warned tech titans that the government is investigating the nexus between consumer data collection and market power and will pursue them for anticompetitive behavior derived therefrom. The antitrust enforcer broached this and other words of warning during his keynote address at the “Challenges to Antitrust in a Changing Economy” conference held at Harvard Law School on Nov. 8.

Aly McDevitt is Data & Research Journalist at Compliance Week. She has a background in education and college consulting. Prior to teaching, she was an editor/author at Thomson Reuters, where she reported...