New article by some middling economists on President Biden's merger enforcement

DETERRENCE IN MERGER REVIEW: LIKELY EFFECTS OF: RECENT U.S. POLICY CHANGES (link)

 By Luke M. Froeb, Steven T. Tschantz & Gregory J. Werden 

We model likely effects of Biden Administration changes in merger enforcement on five discrete decisions in the review process. We find that the policy changes can be expected to stop many bad mergers but only at the cost of stopping even more good mergers, largely as a consequence of the increased cost of the regulatory gauntlet.