Using Economics in Antitrust Decisions.Five Lessons from the European Scene

Five lessons on avoiding common mistakes in antitrust decision making are the subject of this contribution. Although many of the usual mistakes are wellknown by specialists in industrial organisation, practioners keep falling in the same trap time after time. But the mistakes become well-known also to a broader audience and hence it is easy to expose the incompetence or captivity of certain decision makers. The article stresses what errors are inadmissible, and why this is the case.