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“Mergers and difference-in-difference estimator: why firms do not increase prices?”

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  • Juan Luis Jiménez

    () (Facultad de Economía, Empresa y Turismo. Universidad de Las Palmas de Gran Canaria)

  • Jordi Perdiguero

    () (Faculty of Economics, University of Barcelona)

Abstract

Difference-in-Difference (DiD) methods are being increasingly used to analyze the impact of mergers on pricing and other market equilibrium outcomes. Using evidence from an exogenous merger between two retail gasoline companies in a specific market in Spain, this paper shows how concentration did not lead to a price increase. In fact, the conjectural variation model concludes that the existence of a collusive agreement before and after the merger accounts for this result, rather than the existence of efficient gains. This result may explain empirical evidence reported in the literature according to which mergers between firms do not have significant effects on prices.

Suggested Citation

  • Juan Luis Jiménez & Jordi Perdiguero, 2012. "“Mergers and difference-in-difference estimator: why firms do not increase prices?”," IREA Working Papers 201205, University of Barcelona, Research Institute of Applied Economics, revised Feb 2012.
  • Handle: RePEc:ira:wpaper:201205
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    Cited by:

    1. Jordi Perdiguero & Juan Luis Jiménez, 2012. "“Policy options for the promotion of electric vehicles: a review”," IREA Working Papers 201208, University of Barcelona, Research Institute of Applied Economics, revised Mar 2012.
    2. Jordi López-Tamayo & Vicente Royuela & Jordi Suriñach, 2012. "“Building a “quality in work” index in Spain”," AQR Working Papers 201204, University of Barcelona, Regional Quantitative Analysis Group, revised Feb 2012.
    3. Emilie Dargaud & Carlo Reggiani, 2015. "On The Price Effects Of Horizontal Mergers: A Theoretical Interpretation," Bulletin of Economic Research, Wiley Blackwell, vol. 67(3), pages 236-255, July.
    4. Daniel Albalate del Sol, 2013. "The institutional, economic and social determinants of local government transparency," Journal of Economic Policy Reform, Taylor & Francis Journals, vol. 16(1), pages 90-107, March.

    More about this item

    Keywords

    Mergers; Gasoline Market; Difference-in-Difference; Conjectural Variation. JEL classification: L12; L41; L44;

    JEL classification:

    • L12 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Monopoly; Monopolization Strategies
    • L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices
    • L44 - Industrial Organization - - Antitrust Issues and Policies - - - Antitrust Policy and Public Enterprise, Nonprofit Institutions, and Professional Organizations

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