How antitrust enforcement affects corporate ESG performance? Evidence from merger review cases in China

Chinese unique treatment of unreported merger cases (which should be reported according to antitrust law) in the context of merger review provides a distinctive and robust control group for the Difference-in-Differences (DID) research method. We employ the DID method to investigate the impact of China’s merger review antitrust enforcement on Environment, Social and Governance (ESG) performance. We find that the implementation of merger review antitrust enforcement suppresses corporate ESG performance, especially with significant effects observed on the Environment (E) and Governance (G) components. Mechanism analysis indicates that antitrust enforcement poses an impact on corporate profits by reducing market concentration and safeguarding fair market competition. This leads to the emergence of corporate financial performance protection behaviors, resulting in a decrease in corporate ESG performance. Heterogeneous analysis finds that the use of structural remedy in the enforcement process and stronger antitrust enforcement will further intensify the inhibitory effect of antitrust enforcement against business concentration on ESG.