Antitrust on Aisle Five: How Well Do Divestiture Remedies Work?

2026-04-16

AI Summary

This study evaluates the long-term effectiveness of structural divestiture remedies in merger enforcement and their impact on market competition. Leveraging census-level store data and proprietary transaction records from the U.S. grocery retail sector, it provides the first large-scale microeconomic evidence tracking employment, sales, and survival dynamics of divested stores over five years. The analysis identifies asset quality and acquirer capability as critical determinants of post-divestiture outcomes. Findings reveal that divested stores experience, on average, a 31% decline in employment accompanied by proportional sales reductions, driven primarily by high exit rates and persistent contraction. These results indicate that current divestiture mechanisms—by granting merging parties excessive discretion—systematically yield weaker assets and attract less capable buyers, thereby undermining remedy efficacy and challenging conventional assumptions about the robustness of structural remedies in preserving competition.

Technology Category

• Search and Optimization: Evaluation and Analysis
• Game Theory and Economic Paradigms: Fair Division
• Machine Learning: Structured Learning

Application Category

• Economics, Online Markets and Human Computation: Data quality aspects of human-annotated datasets
• Web Mining and Content Analysis: Bridging structured and unstructured data
• Search and Retrieval-Augmented AI: Web evaluation methodologies and metrics

Abstract

Antitrust authorities frequently rely on structural divestitures to address competitive concerns raised by mergers. Using census-level establishment data and proprietary transaction records from the U.S. grocery sector, we provide systematic evidence on the long-run effects of such remedies. Divested stores experience an average 31 percent decline in employment over five years, driven by elevated exit rates and persistent contraction among surviving establishments. Sales similarly decline. Transaction-level evidence indicates that divested assets are systematically weaker and are often transferred to lower-capability buyers. These findings suggest that structural remedies may be less effective when the implementation of divestitures allows merging parties substantial discretion over the assets and buyers involved.

Problem

• antitrust
• divestiture remedies
• merger enforcement
• competitive effects
• structural remedies

Innovation

• divestiture remedies
• antitrust enforcement
• merger policy
• structural remedies
• grocery sector