There is a growing concern that U.S. merger control may have been too lenient, but empirical evidence remains limited. After reviewing event studies as a method to acquire empirical insights into the competitive effects of mergers, I propose a novel application using Hoberg-Phillips TNIC data....

Mergers between competitors (i.e. horizontal mergers) come with two key theories of harm: unilateral effects and coordinated effects. In this paper, we review the appropriate economic framework for assessing coordinated effects in the context of a merger review. We focus on the three necessary...