This paper examines the optimal use of remedies and the efficiency defense for merger control. We develop a framework in which merger efficiency gains are endogenously determined and are not observed by the Competition Authority. The possibility of an efficiency defense can push firms to design...

This paper examines the interaction between two branches of the competition policy, the merger control and the anticartel fighting. Our model takes into account both the imperfect information of the competition agency on the quality of coordination projects undertaken by the industry firms, and...