How Sarbanes-Oxley led to pricier audits for everyone

The research finds fees increased 5 percent, while the probability of switching auditors increased 7 percent. In 2003 and 2009, more than 1,500 nonprofits left the Big Four accounting and audit firms (Deloitte, PricewaterhouseCoopers, EY, and KPMG), a 4 percent decline in market share for nonprofit ...

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