비감사서비스의 유형이 비정상 감사보수에 미치는 영향

This study analyzed empirically how non-audit services influence abnormal audit fees. So to speak, the goal of this study is to find whether or not the auditor which practices both audit services and non-audit services at the same time is paid more than normal audit fees. The data related to non-audit services and audit fees is gathered by hand-collecting from annual reports in DART over 2001-2009. The results of this study are summarized as follows. From the multiple regression analyses controlling for other determinants of audit fees, this study finds the positive relation between non-audit services and abnormal audit fees. This result shows that the auditor offering non-audit services receives higher audit fees than normal audit fees indicating that offering non-audit services is not related to auditors independence. Moreover, tax adjustment services as well as other non-audit services also are positively associated with abnormal audit fees within the 1% significance level. In addition, all dummies of non-audit services which are classified as prohibited, conditional and approved items according to the degree of allowance by the CPA law are positively associated with abnormal audit fees within the 1% significance level. This result suggests that the non-audit services ruled by the CPA law do not affect the independence of auditors with showing legal validity of it. Although the above useful results are showed, this study has the limit points as follows. It is possible that the arbitrary decision of researchers may affect the process identifying types of the non-audit services in annual reports, and high audit fees may be the price of lower audit quality rather than the proxy of high audit quality.