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The effects of non-Big 4 mergers on audit efficiency and audit market competition☆

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  • Kitto, Andrew R.

Abstract

This study examines whether recent mergers between small and midsize accounting firms influence competition by increasing the number of firms that can compete with larger rivals in the U.S. public company audit market. I find that in-market mergers generate efficiencies that are reflected in a post-merger reduction in audit hours but not in reduced audit quality. For both in-market and out-of-market mergers, clients switching to post-merger firms are more likely to be accelerated filers and are significantly larger in terms of several proxies for size and complexity. Lastly, I find that an increase in market-level merger activity is associated with lower profitability of Big 4 firms operating in the same market but only in the smaller client segment. These findings suggest that recent mergers have actually increased competition in some segments of the audit market despite already high concentration and concerns about a lack of sufficient competition.

Suggested Citation

  • Kitto, Andrew R., 2024. "The effects of non-Big 4 mergers on audit efficiency and audit market competition☆," Journal of Accounting and Economics, Elsevier, vol. 77(1).
    • Handle: RePEc:eee:jaecon:v:77:y:2024:i:1:s0165410123000423
    DOI: 10.1016/j.jacceco.2023.101618
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    Keywords

    Auditing; Audit fees; Competition; Efficiency; Mergers; PCAOB;
    All these keywords.

    JEL classification:

    • M41 - Business Administration and Business Economics; Marketing; Accounting; Personnel Economics - - Accounting - - - Accounting
    • M42 - Business Administration and Business Economics; Marketing; Accounting; Personnel Economics - - Accounting - - - Auditing
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • G34 - Financial Economics - - Corporate Finance and Governance - - - Mergers; Acquisitions; Restructuring; Corporate Governance

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