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The effect of retail mergers on prices and variety: An ex-post evaluation

Author

Listed:
  • Argentesi, Elena
  • Buccirossi, Paolo
  • Cervone, Roberto
  • Duso, Tomaso
  • Marrazzo, Alessia

Abstract

Unlike most retrospective merger studies that only focus on price effects, we also estimate the impact of a merger on product variety. We use an original dataset on Dutch supermarkets to assess the effect of a merger that was conditionally approved by the Dutch Competition Authority (ACM) on prices and the depth of assortment. We find that the merger did not affect prices but it led the merging parties to decrease the depth of their assortment, thereby reducing consumer choice. This effect is mainly driven by a reduction in variety for stores that were not re-branded after the merger, suggesting that the merging firms reposition their product offerings in order to avoid cannibalization. We also find that the reduction in variety for the merging parties is partially compensated by competitors increasing variety, except in very concentrated markets where all firms decrease variety. The issuance of divestitures partially outweighed the negative effect of the merger. Yet, it appears that additional divestitures would have been necessary to remove completely the adverse effect of the merger on the depth of assortment.

Suggested Citation

  • Argentesi, Elena & Buccirossi, Paolo & Cervone, Roberto & Duso, Tomaso & Marrazzo, Alessia, 2016. "The effect of retail mergers on prices and variety: An ex-post evaluation," DICE Discussion Papers 225, Heinrich Heine University Düsseldorf, Düsseldorf Institute for Competition Economics (DICE).
    • Handle: RePEc:zbw:dicedp:225
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    References listed on IDEAS

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    Cited by:

    1. Céline Bonnet & Jan Philip Schain, 2020. "An Empirical Analysis Of Mergers: Efficiency Gains And Impact On Consumer Prices," Journal of Competition Law and Economics, Oxford University Press, vol. 16(1), pages 1-35.
    2. Dennis Rickert & Jan Philip Schain & Joel Stiebale, 2021. "Local Market Structure and Consumer Prices: Evidence from a Retail Merger," Journal of Industrial Economics, Wiley Blackwell, vol. 69(3), pages 692-729, September.
    3. Ramon Fauli‐Oller & Joel Sandonís, 2021. "Buyer power, product assortment and asymmetric retail formats," Bulletin of Economic Research, Wiley Blackwell, vol. 73(2), pages 196-211, April.
    4. Kim In Kyung, 2020. "Movie Variety and the City," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 20(3), pages 1-26, July.
    5. Genakos, Christos & Kretschmer, Tobias & Nicolle, Ambre, 2021. "Strategic confusopoly: evidence from the UK mobile market," LSE Research Online Documents on Economics 113835, London School of Economics and Political Science, LSE Library.
    6. Stiebale, Joel & Vencappa, Dev, 2018. "Acquisitions, markups, efficiency, and product quality: Evidence from India," Journal of International Economics, Elsevier, vol. 112(C), pages 70-87.
    7. Dubovik, Andrei, 2018. "Mergers on Networks," MPRA Paper 95458, University Library of Munich, Germany.

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    More about this item

    Keywords

    Mergers; Variety; Ex-post Evaluation; Retail sector; Supermarkets; Grocery;
    All these keywords.

    JEL classification:

    • L1 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance
    • L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices
    • L66 - Industrial Organization - - Industry Studies: Manufacturing - - - Food; Beverages; Cosmetics; Tobacco
    • L81 - Industrial Organization - - Industry Studies: Services - - - Retail and Wholesale Trade; e-Commerce
    • D22 - Microeconomics - - Production and Organizations - - - Firm Behavior: Empirical Analysis
    • K21 - Law and Economics - - Regulation and Business Law - - - Antitrust Law
    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models

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