신외감법 도입에 따른 감사계획과 감사시간 및 감사품질 간의 관련성：감사인 변경 여부를 중심으로

[Purpose]We noted that the deadline of the audit contract has been reduced, which has led to the change to determine whether or not to perform next audit before the end of the current audit due to the adoption of New External Audit Law(hereafter New Law). Therefore, we empirically examine the relationship between the audit planning, audit hours and audit quality according to the adoption of New Law, focusing on whether the auditor has been changed. [Methodology]We performed empirical analyses using OLS regression as companies listed on the KOSPI and KOSDAQ from 2018 to 2019. [Findings]As a result of our analysis, we propose that there is a statistically significant negative relationship between the number of days of audit planning and audit hours when New Law was adopted in the sample of audit, but the initial audit did not show this effect. And unlike when the auditor was changed, the audit quality was improved by adoption of New Law according to the timing of audit planning for the sample of the initial audit. Therefore, we also suggest that audit planning can be related to audit hours and audit quality as previous studies. [Policy Implications]We empirically analyzed the relationship between the audit planning and the improvement of audit quality of initial audit and the efficiency of audit hours when the auditor was not changed after the adoption of New Law. Therefore we indirectly suggest the policy effect of the adoption of New Law.