비감사서비스, 고객중요성이 감사인독립성 및 시장반응에 미치는 영향

The study examines the effects that non-audit service and client importance might have on the value relevance directly or indirectly. This investigation is based on prior research which suggests that the audit firms' non-audit services is likely to adversely affect investors’ perceptions of the credibility of financial reporting and that client importance are likely to mitigate the adverse this kind of non-audit services effects. The sample consists of non-banking firms listed on the Korea Exchange that reported annual financial statements over the period from 2004 to 2008. In the setting, stock returns as proxy for capital market response, auditor independence(measured as the discretionary accruals and book-tax difference) is endogenously determined. This study employs a structural equation model to take into account the endogenous variables under study. The analysis influences through the path analysis that client importance suppress the market response through auditor independence and also the non-audit service have influence on the market response through auditor independence. The results of this study contribute to the literature in the following ways. First, this provides direct evidence that there is a negative association between audit firms' client importance and the value relevance. recond, the findings that the negative association is attenuated for independence of auditors support the findings of prior studies which present that client importance provide higher credibility of financial reports.