Working Paper No. 621

Do Mergers Result in Collusion?

Published: June 14, 2004Pages: 34Keywords: Merger Control; Collusion; Coordinated Effects; Oligopolistic Dominance; Competition PolicyJEL-codes: D43; L13; L41

Do Mergers Result in Collusion? Mattias Ganslandt and Pehr-Johan Norbäck

We examine coordinated effects of mergers in the Swedish retail market for gasoline during the period 1986-2002. Despite significant changes in market concentration and many factors conductive to coordination, the empirical analysis shows that the level of coordination is low. In addition, statistical tests reject the hypothesis that mergers and acquisitions result in "coordinated effects". In particular, higher market concentration does not result in more collusive behavior and, consequently, the relevance of simple "checklists" in merger control can be questioned.


Pehr-Johan Norbäck


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Sick of Inequality?

An Introduction to the Relationship between Inequality and Health

Sick of Inequality.jpg

In this book Andreas Bergh, Therese Nilsson, IFN and Lund University, and Daniel Waldenström, IFN and Paris School of Economics, France, review the latest research on the relationship between inequality and health. What does inequality mean for our health? Does increasing income inequality affect outcomes such as obesity, life expectancy and subjective well-being?


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