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The Impact of the Big 4 Consolidation on Audit Market Share Equality

机译:四大合并对审计市场份额平等的影响

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摘要

We investigate the Big 5 to Big 4 consolidation and its impact on audit market share equality. We extend the GAO's (2008) study on audit firm industry market concentration to examine whether the remaining Big N firms' market shares are more equal after the Big 4 consolidation. We also extend the GAO study to examine audit market shares at the city and city-industry levels. We find that while overall market concentration increases, the Big 4 have more equal market shares than the Big 5 had prior to the consolidation at all levels of analysis. The increase in market share equality may explain why there has been inconsistent evidence of an association between mar ket concentration and competition after the consolidation (Feldman 2006; GAO 2008). However, we find that the largest four clients in each market we examine are more likely to share the same auditor after consolidation, which suggests the largest clients face constrained choices.
机译:我们调查了5大到4大合并及其对审计市场份额平等的影响。我们扩展了GAO(2008年)对审计公司行业市场集中度的研究,以研究四大公司合并后剩余的大N公司的市场份额是否更平等。我们还将GAO研究扩展到检查城市和城市行业一级的审计市场份额。我们发现,尽管总体市场集中度有所提高,但在所有层次的分析中,四大巨头的市场份额都比五大巨头在合并之前更高。市场份额平等的增加可能解释了为什么在合并后市场集中度和竞争之间没有统一的证据(Feldman 2006; GAO 2008)。但是,我们发现合并后的每个市场中最大的四个客户更有可能在合并后共享同一位审计师,这表明最大的客户面临选择受限的问题。

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