The Trump Administration might follow Donald Trump's populist campaign rhetoric and adopt an approach to antitrust enforcement that emphasizes reining in corporate power. This approach would honor the preferences of the working-class voters who have put Trump into office by vigorously enforcing...

Economists widely agree that, absent sufficient efficiencies or other offsetting factors, mergers that increase concentration substantially are likely to be anticompetitive. Further, holding everything else equal, the magnitude of anticompetitive effects tends to be larger, the larger is the...