내부회계관리제도 외부감사의 실효성에 대한 연구

This paper investigates the effectiveness of external audit of internal accounting control through following 3 topics. The first is an effect of external audit to internal accounting control on earnings quality, the second is an effect of external audit to internal accounting control on level of human resource in internal accounting control(the total number of personnel, the ratio of CPAs to total number of personnel, years of experience of personnel in internal accounting control), and the third is a moderate effect of level of Human resource in internal accounting control on a relation between External Audit to internal accounting control and Earnings quality. Samples are 1,224 firms listed on KOSDAQ and KOSPI from 2016 to 2020. The results are as follows. First, both Earnings Quality and the level of Human resource in internal accounting control were improved after External Audit to internal accounting control. Second, the earnings quality were improved when the firms increased the ratio of CPAs to total number of human resources in internal accounting control after External Audit to internal accounting control. The implications are as follows. Firrst, This study contributes to the generalization of research findings in a context where previous studies on the effectiveness of internal accounting control system audits have reported mixed results. Second, It provides empirical evidence that firms expand their investment in human resource in internal accounting control to respond to the revision of the External Audit Act. Third, it is necessary for the share-holders to expand their investment in Human resource in internal accounting control to improve earnings quality through these results.