The economic impact of audit failures

Abstract

This paper examines the economic consequences associated with an audit failure in the field of statutory auditing services, by analyzing changes in the audit firm’s market share around the time of the investigation process undertaken by the Spanish Public Oversight Board. We explore the variations in audit market share by applying the difference in differences method to a treatment group of 70 sanctioned audit firms and a matched control group of 70 non-sanctioned audit firms. The period of analysis covers the years from 1999 to 2015. Our results show that the sanctioned audit firms suffered a significant decrease in their relative number of clients. Moreover, this measure of market share decreased not only after the publication of the sanction disclosure (which may be attributed to reputational losses) but also after the initiation of the investigation (which may be attributed to the firm’s reluctance to audit risky clients). Findings are similar for both small and large firms when the market share is measured in terms of clients, whereas the evidence is weak concerning variations in their turnover-based market share. Our conclusions could be of interest for audit firms and also for audit regulators when designing disciplinary systems.

Keywords

• Sanction
• Audit Failure
• Market Share
• Economic losses
• Difference in Differences