Additional Evidence On The Large Audit-Firm Fee Premium As An Indication Of Auditor Quality

Abstract

Several studies of the U.S. market for audit services have found evidence of a large audit-firm fee premium. This premium has been interpreted as an indication that large audit firms (typically defined as the Big Eight, now the Big Six), considered as a group, receive higher fees than non-Big Eight firms and thus are perceived to provide higher quality audit services. A common interpretation has been that there is a strong relationship between audit firms size and audit quality. That is, the observed Big Eight fee premium has been interpreted as evidence that this group of large auditors, as a whole, is perceive to provide higher quality audits. Using larger samples than previous studies, this paper decomposes the large auditor fee premium into a separate fee premium effect for each auditor. The results suggest that the observed fee premium is attributable to a subset of large auditors, and therefore it is possible that not all of this group of large audit firms are perceived as offering significantly different audit products, at least when differential audit fees and used as a measure of product differentiation. In addition, when observed audit fee premiums are related to other proxies for auditor quality, there is confirming evidence that large accounting firms are not perceived as a homogeneous group with respect to audit quality.