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Long-run Effect of a Horizontal Merger and Its Remedial Standards

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  • FUKASAWA Takeshi
  • OHASHI Hiroshi

Abstract

This paper estimates a dynamic oligopoly model with firms’ continuous investment decisions to assess long-run consequences of a horizontal steel merger. It employs a novel simulation method to show that the merger improved social welfare. While the merger discouraged the merged firm from investing in capacity, it encouraged investment within non-merged firms, absent the efficiency gains of the merger. The paper also evaluates the remedial measure targeting asset divestiture that was endorsed by the competition authority. The paper finds that the effects of the merger remedy persisted for the 20 years after its implementation covered by this study, and the prescribed remedy differed considerably on the standpoint of either consumer or social welfare standards.

Suggested Citation

  • FUKASAWA Takeshi & OHASHI Hiroshi, 2023. "Long-run Effect of a Horizontal Merger and Its Remedial Standards," Discussion papers 23001, Research Institute of Economy, Trade and Industry (RIETI).
    • Handle: RePEc:eti:dpaper:23001
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    References listed on IDEAS

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