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Title

The Influence of the Sarbanes-Oxley Act on Audit Quality: Evidence from Nonprofit Hospitals Subject to the Single Audit Act

Author

Michele M. McGowan, Nova Southeastern UniversityFollow

Date of Award

2014

Document Type

Dissertation - NSU Access Only

Degree Name

Doctor of Business Administration (DBA)

Department

H. Wayne Huizenga School of Business and Entrepreneurship

Advisor

Siew Chan

Committee Member

Yuliya Yurova

Committee Member

Chunhui (Maggie) Liu

Abstract

This study uses an institutional theory perspective to examine whether significant changes to the audit work and engagement practices required under the Sarbanes-Oxley Act (SOX) lead to improved audit quality in nonprofit hospitals. Unlike their for-profit counterparts, nonprofit organizations have been subject to audits of internal controls over financial reporting and program compliance for decades under Circular A-133 of the Single Audit Act of 1984, as amended. Circular A-133 audits represent the primary accountability tool over the billions of grant dollars awarded annually by the federal government. Despite the enormity of these awards and the substantial informational effect of the audit reports, prior empirical research suggests that the quality of these audits is problematic.

Using the archival data of nonprofit hospital Circular A-133 audits and related hand-collected financial data from IRS Form 990s, bivariate and multivariate analyses are conducted on a cross-sectional sample of 875 audits for 141 nonprofit hospitals with audits during both pre-SOX (2001-2004) and post-SOX (2008-2011) periods. Audit quality is inferred from discretionary accruals (Modified Jones model) and auditor-reported internal control deficiencies (reportable conditions and material weaknesses).

The results indicate support for improved audit quality from the pre- to the post-SOX period for all measures of audit quality. The results are different for the measures of audit quality used to examine the association between audit firm size and audit quality. Non-Big 4 audit firms experienced a significant improvement in audit quality when discretionary accruals are used as a proxy for audit quality. Conversely, Big 4 audit firms experienced a significant improvement in audit quality when internal control deficiencies are proxies for audit quality. In the post-SOX period audit firms provide approximately the same level of audit quality regardless of firm size when discretionary accruals or material weaknesses are the proxy for audit quality. When reportable conditions are the proxy, non-Big 4 firms have higher audit quality than Big 4 firms post-SOX. Client characteristics, specifically hospital size and the interaction of leverage and risk, are attributable to differences in post-SOX audit quality. Finally, the study fails to support the hypothesis that large audit firms self-select low risk clients.

NSUWorks Citation

Michele M. McGowan. 2014. The Influence of the Sarbanes-Oxley Act on Audit Quality: Evidence from Nonprofit Hospitals Subject to the Single Audit Act. Doctoral dissertation. Nova Southeastern University. Retrieved from NSUWorks, H. Wayne Huizenga School of Business and Entrepreneurship. (74)
https://nsuworks.nova.edu/hsbe_etd/74.