감사품질이 가결산순이익과 결산순이익의 차이에 미치는 영향

This paper empirically analyzes the effect of audit quality on preliminary - actual earnings differences. Specifically, this paper investigates whether non-audit services(the provision of non-audit service, the level and ratio of non-audit service fee, and the provision of tax service) and audit time affect preliminary - actual earnings differences, instead of accounting accrual, Prior literature study shows mixed results on whether non-audit services and audit time provided by an auditor compromise audit quality. The sample consists of non-banking firms(222 firm-years) with December fiscal year listed in Korean Stock Exchange over 2002~2005. Empirical findings are summarized as follows; First, as it is shown in table 5, both the provision of non-audit service itself and the level or ratio of non-audit service fee have a significant negative relation with preliminary - actual earnings differences. And the provision of tax service(one of non-audit service) itself has a significant negative relation with preliminary - actual earnings differences. Second, as it is reported in table 6, audit time has a significant positive relation with preliminary - actual earnings differences. These results imply that auditors' independence is impaired by non-audit services and audit time has an effect on audit quality. In the raising interest of non-audit services and audit time, the results of this study can provide beneficial information to the academic and administrative work by verifying effect of non-audit service and audit time on preliminary - actual earnings differences.