Merger simulations with observed diversion ratios
A common approach to merger simulations used in antitrust cases is to calibrate demand from market shares and a few additional parameters. When the products involved in the merger case are differentiated along several dimensions, the resulting diversion ratios may be very different from those based upon market shares. This again may affect the predicted post-merger price effects. This article shows how merger simulation can be improved by using observed diversion ratios. To illustrate the effects of this approach we use diversion ratios from a local grocery market in Norway. In this case diversions from the acquired to the acquiring stores were considerably smaller than suggested by market shares, and the predicted average price increase from the acquisition was 40 % lower using this model rather than a model based upon market shares. This analysis also suggests that even a subset of observed diversion ratios may significantly change the prediction from a merger simulation based upon market shares.
|Date of creation:||30 Sep 2010|
|Date of revision:|
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- Werden, Gregory J & Froeb, Luke M, 1994. "The Effects of Mergers in Differentiated Products Industries: Logit Demand and Merger Policy," Journal of Law, Economics and Organization, Oxford University Press, vol. 10(2), pages 407-26, October.
- Aviv Nevo, 2000. "Mergers with Differentiated Products: The Case of the Ready-to-Eat Cereal Industry," RAND Journal of Economics, The RAND Corporation, vol. 31(3), pages 395-421, Autumn.
- Pinkse, Joris & Slade, Margaret E., 2004. "Mergers, brand competition, and the price of a pint," European Economic Review, Elsevier, vol. 48(3), pages 617-643, June.
- Roy J. Epstein & Daniel L. Rubinfeld, 2002. "Merger Simulation: A Simplified Approach with New Applications," Industrial Organization 0201002, EconWPA.
- Oliver Budzinski & Isabel Ruhmer, 2008.
"Merger Simulation in Competition Policy: A Survey,"
MAGKS Papers on Economics
200807, Philipps-Universität Marburg, Faculty of Business Administration and Economics, Department of Economics (Volkswirtschaftliche Abteilung).
- Shapiro, Carl & Farrell, Joseph, 2008.
"Antitrust Evaluation of Horizontal Mergers: An Economic Alternative to Market Definition,"
Department of Economics, Working Paper Series
qt35c5f846, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
- Farrell Joseph & Shapiro Carl, 2010. "Antitrust Evaluation of Horizontal Mergers: An Economic Alternative to Market Definition," The B.E. Journal of Theoretical Economics, De Gruyter, vol. 10(1), pages 1-41, March.
- Farrell, Joseph & Shapiro, Carl, 2008. "Antitrust Evaluation of Horizontal Mergers: An Economic Alternative to Market Definition," Competition Policy Center, Working Paper Series qt8z51b1q8, Competition Policy Center, Institute for Business and Economic Research, UC Berkeley.
- Mathiesen, Lars & Nilsen, Øivind Anti & Sørgard, Lars, 2010.
"Merger simulations with observed diversion ratios,"
Discussion Paper Series in Economics
27/2010, Department of Economics, Norwegian School of Economics.
- repec:adr:anecst:y:1994:i:34:p:06 is not listed on IDEAS
- Bordley, Robert F, 1985. "Relating Elasticities to Changes in Demand," Journal of Business & Economic Statistics, American Statistical Association, vol. 3(2), pages 156-58, April.
- Ivaldi, Marc & Verboven, Frank, 2001.
"Quantifying the Effects from Horizontal Mergers in European Competition Policy,"
CEPR Discussion Papers
2697, C.E.P.R. Discussion Papers.
- Ivaldi, Marc & Verboven, Frank, 2005. "Quantifying the effects from horizontal mergers in European competition policy," International Journal of Industrial Organization, Elsevier, vol. 23(9-10), pages 669-691, December.
- Bordley, Robert F, 1993. "Estimating Automotive Elasticities from Segment Elasticities and First Choice/Second Choice Data," The Review of Economics and Statistics, MIT Press, vol. 75(3), pages 455-62, August.
- Yacine AIT-SAHALIA, 1994. "Entry-Exit Decisions of Foreign Firms and Import Prices," Annals of Economics and Statistics, GENES, issue 34.
- Philip Crooke & Luke Froeb & Steven Tschantz & Gregory Werden, 1999. "Effects of Assumed Demand Form on Simulated Postmerger Equilibria," Review of Industrial Organization, Springer, vol. 15(3), pages 205-217, November.
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