International economic relations and American support for antitrust policy

Antitrust policy aims to reduce market concentration and increase competition among firms. Contemporary antitrust is sensitive to both domestic and international considerations. Internationally, the market is dominated by the largest firms, raising questions about the competitiveness of domestic firms and the application of antitrust against foreign firms. Domestically, public support for antitrust is needed for continued enforcement. This paper examines how international markets shape public support for antitrust in the United States. Using media analysis, we find that antitrust is increasingly in the news, and that international competition is referenced in antitrust debates. We theorize that support for antitrust is shaped by concerns for the competitiveness of domestic firms, relative to foreign competition, and that these concerns vary based on individuals’ levels of nationalism. We test our theory using a survey experiment and find that individuals are especially concerned with being placed at a disadvantage relative to foreign competitors. Interestingly, we find that using antitrust laws against foreign firms yields divergent reactions—highly nationalistic Americans increase their support for strong antitrust laws, while those with low levels of nationalism decrease support. The paper highlights the importance of global competition in shaping preferences for domestic regulation.