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감사위원회 독립성과 감사품질의 관련성-외부감사인 규모의 매개효과와 대리인문제의 조절효과를 중심으로-

Relationship between Audit Committee's Independence and Audit Quality: Focused on Mediated Effect of Auditor's Size and Moderating Effect of Agency Problems

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키워드

주제분류경영학

초록

본 연구는 감사위원회를 도입한 기업을 대상으로 감사위원회의 독립성과 외부감사인 규모 및 감사보수로 측정한 감사품질 사이의 관계를 분석하였다. 먼저 감사위원회의 독립성과 감사보수 사이의 관계에서 외부감사인 규모의 매개효과를 검증하였다. 또한 감사위원회 독립성이 감사보수에 미치는 영향이 대리인문제에 따라 차이가 있는지 검증하였다. 2000년부터 2010년까지 한국거래소 유가증권 시장에 상장된 비금융기업 가운데, 감사위원회를 도입한 1,108개 기업-년 자료를 분석한 결과는 다음과 같다. 첫째, 감사위원회 독립성이 외부감사인 규모에 유의적인 양의 영향을 미치며, 외부감사인 규모는 감사보수에 유의적인 양의 영향을 미치는 것으로 나타났다. 즉, 외부감사인 규모가 감사위원회 독립성과 감사보수 사이의 관계에서 매개변수 역할을 수행하고 있음을 파악하였다. 둘째, 주주와 경영자 사이의 대리인문제가 큰 비소유경영자의 경우, 감사위원회 독립성이 감사보수에 미치는 영향이 더 크게 나타났다. 또한 소액주주와 지배주주 사이의 대리인문제가 큰 대규모기업집단에 소속된 기업인 경우, 감사위원회의 독립성이 감사보수에 미치는 영향이 더 크게 나타났다. 본 연구결과는 외부감사인 규모가 감사위원회 독립성과 감사보수 사이의 관계에서 매개변수로서 역할을 수행한다는 사실과 감사위원회가 효과적으로 운영될 수 있는 상황에 대한 실증적 근거를 제시한다는 점에서 의의가 있다.

Abstract

This paper examines the relationship between audit committee independence and audit quality which is measured by auditor size and audit fees. Thus, this study tries to empirically answer the following two research questions: (1) Does audit size play a mediating role in the relationship between audit committee independence and audit fees? (2) Do agency problems influence the association between audit committee independence and audit fees? To address two research question, we collect 1,108 non- financing firm-year data of Korean listed companies adopting audit committees for the period of 2000 to 2010. Our empirical findings are as follows. First, we find that audit committee independence has a positive impact on auditor size, thereby increasing audit fees. These results are consistent with our conjecture that auditor size plays an important mediating role in the association between audit committee independence and audit fees. Second, the association between audit committee independence and audit fees is significantly higher for non-owner-controlled firms than owner-controlled ones. In addition, the relationship between audit committee independence and audit fees is significantly greater for firms belong to the business group called “Chaebol” than firms that do not belong to any business group. These results of this paper help to provide evidence on the mediating role of auditor size in the association between audit committee independence and audit fees. Our results also can help regulatory bodies to set up guidelines for formation and implementation of audit committee.

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