We document the effects of a comprehensive set of US retail mergers. On average, prices increase by 1.5% and quantities decrease by 2.3%, with significant heterogeneity in outcomes across mergers. Price changes correlate with the screens codified in the Horizontal Merger Guidelines. Through a...

This Comment is written in response to DOJ-FTC Request for Information on Merger Enforcement. We explain that the use of pricing algorithms based on artificial intelligence methodologies (hereinafter: "pricing algorithms"), by one or both parties, should be taken into account in the merger...

Contents -- Preface -- 1 Introduction -- 2 Mergers and Merger Policy in the United States: An Overview -- 3 Evaluating Merger Outcomes -- 4 Guide to Merger Analysis Using Difference in Differences -- 5 Merger Retrospectives: Two Studies -- 6 Mergers and Product Prices -- 7 Merger Policy and...