Merger simulations with observed diversion ratios
One 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, actual diversion ratios may be very different from those calculated from market shares. This again may affect the predicted post-merger price effects. This article shows how merger simulation can be performed using observed diversion ratios. To illustrate the potential 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.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Oliver Budzinski & Isabel Ruhmer, 2009.
"Merger Simulation in Competition Policy: A Survey,"
82/09, University of Southern Denmark, Department of Environmental and Business Economics.
- Roy J. Epstein & Daniel L. Rubinfeld, 2002. "Merger Simulation: A Simplified Approach with New Applications," Industrial Organization 0201002, EconWPA.
- Jerry Hausman & Gregory Leonard & J. Douglas Zona, 1994. "Competitive Analysis with Differentiated Products," Annals of Economics and Statistics, GENES, issue 34, pages 143-157.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Philip Crooke & Luke Froeb & Steven Tschantz & Gregory Werden, 1999. "Effects of Assumed Demand Form on Simulated Postmerger Equilibria," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 15(3), pages 205-217, November.
- repec:adr:anecst:y:1994:i:34:p:06 is not listed on IDEAS
- 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.
- Mathiesen, Lars & Nilsen, Øivind Anti & Sørgard, Lars, 2011.
"Merger simulations with observed diversion ratios,"
International Review of Law and Economics,
Elsevier, vol. 31(2), pages 83-91, June.
- 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.
- repec:adr:anecst:y:1994:i:34 is not listed on IDEAS
- 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.
- 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.
When requesting a correction, please mention this item's handle: RePEc:eee:irlaec:v:31:y:2011:i:2:p:83-91. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Shamier, Wendy)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.