Market Segmentation and Premium Pricing in the Post-Sarbanes-Oxley Market for Audit Services

• In Event: Continental Breakfast and Research & Education Forum
  In Roundtable Session: Table 6: Business Structure and Audit Fees

Abstract

Abstract: this study has two main foci. First, the study investigates the impact of Sarbanes-Oxley Act (SOX) on the Big 4 fee premium. Second, the study investigates the relationship between the size of an audit client and annual fee change. The results show that in the post-SOX environment, clients of non-Big 4 firms have experienced greater increases in audit fees than the clients of the Big 4 firms, resulting in a diminishing Big 4 premium. This is consistent with the notion that non-Big 4 clients had to make significant adjustments to meet post-SOX quality requirements by increasing their effort (and consequently audit fees). The results also show audit firms’ large clients experience the largest percentage increase in audit fees. This is consistent with the theoretical view of consumer surplus, where the large clients, with more resources, have greater levels of consumer surplus, which is being captured by the audit firms. The study contributes to our understanding of the impact of SOX on audit fee premium and the economics of audit market competition in different client segments.

Author

• Alexey Lyubimov, Concordia University