Impact Evaluation of Merger Control Decisions

48 Pages Posted: 23 Nov 2011 Last revised: 22 Aug 2012

Date Written: August 17, 2012


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.

Keywords: empirical methods of industrial organization, merger control, competition policy, antitrust decisions, comparative analysis

JEL Classification: C18, C54, L41, L40, K21

Suggested Citation

Budzinski, Oliver, Impact Evaluation of Merger Control Decisions (August 17, 2012). Available at SSRN: or

Oliver Budzinski (Contact Author)

Ilmenau University of Technology ( email )

Ilmenau, D-98684


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