Antitrust & Competition Policy Blog

Editor: D. Daniel Sokol
University of Florida
Levin College of Law

Wednesday, January 4, 2012

Impact Evaluation of Merger Decisions

Posted by D. Daniel Sokol

Oliver Budzinski, University of Southern Denmark - Department of Environmental and Business Economics offers Impact Evaluation of Merger Decisions.

ABSTRACT: The German version of this paper can be found at

This paper provides a comparative analysis of methods for the empirical ex post evaluation of merger control decisions. It develops a competition-policy oriented framework of assessment criteria for the leading evaluation methods and applies them to structural modeling and simulation, differences-in-differences methods, event studies as well as survey-based methods. It concludes that a method-mix is recommendable, however, under the exclusion of event studies that fail to secure a minimum level of reliability regarding the evaluation results. Furthermore, it warns against overly optimistic expectations about the effects of systematic impact evaluations of merger decisions.

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