IDEAS home Printed from https://ideas.repec.org/p/arx/papers/2407.12924.html
   My bibliography  Save this paper

Concentration-Based Inference for Evaluating Horizontal Mergers

Author

Listed:
  • Paul S. Koh

Abstract

Antitrust authorities routinely rely on concentration measures to evaluate the potential negative impacts of mergers. Using a first-order approximation argument with logit and CES demand, I show that the welfare effect of a merger on consumer surplus is proportional to the change in the Herfindahl-Hirschman index, where the proportionality coefficient depends on price responsiveness parameter, market size, and the distribution of merging firms' shares. This paper elucidates how HHI measures inform the market power effects of mergers.

Suggested Citation

  • Paul S. Koh, 2024. "Concentration-Based Inference for Evaluating Horizontal Mergers," Papers 2407.12924, arXiv.org, revised Jul 2024.
  • Handle: RePEc:arx:papers:2407.12924
    as

    Download full text from publisher

    File URL: http://arxiv.org/pdf/2407.12924
    File Function: Latest version
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Miller, Nathan H. & Remer, Marc & Ryan, Conor & Sheu, Gloria, 2017. "Upward pricing pressure as a predictor of merger price effects," International Journal of Industrial Organization, Elsevier, vol. 52(C), pages 216-247.
    2. Froeb, Luke M. & Werden, Gregory J., 1998. "A robust test for consumer welfare enhancing mergers among sellers of a homogeneous product," Economics Letters, Elsevier, vol. 58(3), pages 367-369, March.
    3. Tommaso Valletti & Hans Zenger, 2021. "Mergers with Differentiated Products: Where Do We Stand?," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 58(1), pages 179-212, February.
    4. Nathan H. Miller & Marc Remer & Conor Ryan & Gloria Sheu, 2016. "Pass-Through and the Prediction of Merger Price Effects," Journal of Industrial Economics, Wiley Blackwell, vol. 64(4), pages 683-709, December.
    5. Volker Nocke & Nicolas Schutz, 2018. "Multiproduct‐Firm Oligopoly: An Aggregative Games Approach," Econometrica, Econometric Society, vol. 86(2), pages 523-557, March.
    6. 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.
    7. E. Glen Weyl & Michal Fabinger, 2013. "Pass-Through as an Economic Tool: Principles of Incidence under Imperfect Competition," Journal of Political Economy, University of Chicago Press, vol. 121(3), pages 528-583.
    8. Orley C. Ashenfelter & Daniel S. Hosken & Matthew C. Weinberg, 2015. "Efficiencies brewed: pricing and consolidation in the US beer industry," RAND Journal of Economics, RAND Corporation, vol. 46(2), pages 328-361, June.
    9. Volker Nocke & Michael D. Whinston, 2022. "Concentration Thresholds for Horizontal Mergers," American Economic Review, American Economic Association, vol. 112(6), pages 1915-1948, June.
    10. Nathan H. Miller & Matthew Osborne & Gloria Sheu, 2017. "Pass-through in a concentrated industry: empirical evidence and regulatory implications," RAND Journal of Economics, RAND Corporation, vol. 48(1), pages 69-93, March.
    11. Sonia Jaffe & E. Glen Weyl, 2013. "The First-Order Approach to Merger Analysis," American Economic Journal: Microeconomics, American Economic Association, vol. 5(4), pages 188-218, November.
    12. Yossi Spiegel, 2021. "The Herfindahl‐Hirschman Index and the Distribution of Social Surplus," Journal of Industrial Economics, Wiley Blackwell, vol. 69(3), pages 561-594, September.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Nathan H. Miller & Gloria Sheu, 2021. "Quantitative Methods for Evaluating the Unilateral Effects of Mergers," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 58(1), pages 143-177, February.
    2. Miller, Nathan H. & Remer, Marc & Ryan, Conor & Sheu, Gloria, 2017. "Upward pricing pressure as a predictor of merger price effects," International Journal of Industrial Organization, Elsevier, vol. 52(C), pages 216-247.
    3. Tommaso Valletti & Hans Zenger, 2021. "Mergers with Differentiated Products: Where Do We Stand?," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 58(1), pages 179-212, February.
    4. Paul S. Koh, 2024. "Merger Analysis with Latent Price," Papers 2404.07684, arXiv.org, revised Jul 2024.
    5. Miravete, Eugenio J. & Seim, Katja & Thurk, Jeff, 2023. "Pass-through and tax incidence in differentiated product markets," International Journal of Industrial Organization, Elsevier, vol. 90(C).
    6. Mansley, Ryan & Miller, Nathan H. & Sheu, Gloria & Weinberg, Matthew C., 2023. "A price leadership model for merger analysis," International Journal of Industrial Organization, Elsevier, vol. 89(C).
    7. Takanori Adachi & Michal Fabinger, 2017. "Multi-Dimensional Pass-Through, Incidence, and the Welfare Burden of Taxation in Oligopoly," CIRJE F-Series CIRJE-F-1040, CIRJE, Faculty of Economics, University of Tokyo.
    8. Jéssica Dutra & Tarun Sabarwal, 2020. "Antitrust analysis with upward pricing pressure and cost efficiencies," PLOS ONE, Public Library of Science, vol. 15(1), pages 1-31, January.
    9. Genakos, C. & Grey, F. & Ritz, R., 2020. "Generalized linear competition: From pass-through to policy," Cambridge Working Papers in Economics 2078, Faculty of Economics, University of Cambridge.
    10. Daniel Greenfield & Jeremy A. Sandford, 2021. "Upward pricing pressure in mergers of capacity‐constrained firms," Economic Inquiry, Western Economic Association International, vol. 59(4), pages 1723-1747, October.
    11. Takanori Adachi & Michal Fabinger, 2017. "Multi-Dimensional Pass-Through and Welfare Measures under Imperfect Competition," Papers 1702.04967, arXiv.org, revised Dec 2018.
    12. Dan Hanner & Ginger Zhe Jin & Marc Luppino & Ted Rosenbaum, 2016. "Economics at the FTC: Horizontal Mergers and Data Security," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 49(4), pages 613-631, December.
    13. Cosnita-Langlais, Andreea & Johansen, Bjørn Olav & Sørgard, Lars, 2021. "Upward pricing pressure in two-sided markets: Incorporating rebalancing effects," International Journal of Industrial Organization, Elsevier, vol. 74(C).
    14. Takanori Adachi & Muhammad Michal Fabinger, 2017. "Multi-Dimensional Pass-Through, Incidence, and the Welfare Burden of Taxation in Oligopoly," CIRJE F-Series CIRJE-F-1040, CIRJE, Faculty of Economics, University of Tokyo.
    15. Voudon, Benoît, 2022. "Indicative Price Rise with synergies," Economics Letters, Elsevier, vol. 218(C).
    16. Jessica Dutra & Tarun Sabarwal, 2018. "Cost Efficiencies and Upward Pricing Pressure," WORKING PAPERS SERIES IN THEORETICAL AND APPLIED ECONOMICS 201901, University of Kansas, Department of Economics.
    17. Christopher Conlon & Julie Holland Mortimer, 2021. "Empirical properties of diversion ratios," RAND Journal of Economics, RAND Corporation, vol. 52(4), pages 693-726, December.
    18. Christos Genakos & Mario Pagliero, 2022. "Competition and Pass-Through: Evidence from Isolated Markets," American Economic Journal: Applied Economics, American Economic Association, vol. 14(4), pages 35-57, October.
    19. Yongmin Chen & Marius Schwartz, 2016. "Churn Versus Diversion in Antitrust: An Illustrative Model," Economica, London School of Economics and Political Science, vol. 83(332), pages 564-583, October.
    20. Robert Willig, 2011. "Unilateral Competitive Effects of Mergers: Upward Pricing Pressure, Product Quality, and Other Extensions," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 39(1), pages 19-38, August.

    More about this item

    NEP fields

    This paper has been announced in the following NEP Reports:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:arx:papers:2407.12924. See general information about how to correct material in RePEc.

    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 CitEc recognized a bibliographic reference but did not link an item in RePEc 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 RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: arXiv administrators (email available below). General contact details of provider: http://arxiv.org/ .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.