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이익조정과 최고경영자 교체가능성의 관련성 : 생존분석을 중심으로

The Association between Earnings Management and the Risk of CEO Turnover : A Survival Analysis

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주제분류회계학

초록

경영자는 자신에게 허용된 회계 재량권을 이용하여 보고이익 수치를 필요에 따라 조정하는 경향이 있는 것으로 알려지고 있다. 이러한 이익의 조정은 미래 현금흐름의 예측가능성을 제고하거나 기업 가치에 긍정적인 영향을 끼치기 위해 시도되는 경우도 있으나 때로는 경영자의 사적 효익을 증대시키기 위한 목적으로 시도되기도 한다. 경영자의 사적효용 극대화 관점에서 수행된 이익조정은 기업정보에 대한 신뢰성을 저하시켜 향후 기업에 막대한 비용을 초래할 가능성을 소지하고 있어 주주 및 이해관계자 집단은 내부통제 시스템을 통해 이를 감시하고 견제한다. 본 연구는 이러한 상황인식을 전제로 하여 경영자의 자의적인 이익조정 행위가 주주 및 이해관계자 집단으로부터의 경영자에 대한 신뢰성 약화시켜 결국 경영자의 교체가능성을 증폭시키는 요인이 되는지를 검증하고자 한다. 구체적으로 2001년부터 2006년까지 경영자의 재임기간을 확인할 수 있는 표본을 이용하여 최고경영자의 재임기간 동안에의 발생액 및 실물활동에 기초한 이익조정 성향이 최고경영자의 교체가능성을 증가시키고 있는지를 생존분석(survival analysis)을 통해 검증한다. 나아가 최고경영자의 교체유형을 자발적 교체와 강제적 교체로 구분하여 교체유형에 따라 이익조정과 경영자 교체간의 관련성이 차별적으로 존재하는지에 대해서도 분석하였다. 주요한 실증분석 결과를 요약하면 다음과 같다. 첫째, 최고경영자의 재임기간 동안에의 재량적 발생액 절댓값의 평균과 최고경영자의 교체확률 간에 유의한 양(+)의 관련성이 관찰된 반면 실물이익조정척도와 최고경영자 교체확률 간에는 어떠한 통계적 유의성도 관찰되지 않았다. 이는 다양한 동기에서 비롯된 경영자의 이익조정 행위가 내부통제시스템의 감시와 견제 기능으로 인해 최고경영자 자신의 교체가능성을 증폭시키는 요인이 될 수 있으나 이익조정 수단에 따라 그러한 양자의 관련성에 차이가 존재함을 의미한다. 둘째, 최고경영자의 교체유형을 자발적 교체와 강제적 교체로 구분하였을 경우 이익조정과 자발적 교체확률 간에는 어떠한 유의적인 관련성도 관찰되지 않는 반면, 이익조정과 강제적 교체 간에는 교체유형을 구분하지 않았을 경우 보다 더욱 강한 양(+)의 상관관계가 존재하고 있음을 확인하였다. 이는 최고경영자의 자의적인 이익조정 행위를 기업의 이해관계자들이 부정적으로 인식함에 따라 그에 대한 문책으로 최고경영자를 강제적으로 해임하고 있음을 입증하는 결과로 해석할 수 있다. 본 연구의 결과는 최고경영자 재임기간 동안에의 이익조정이 경영자 자신의 교체가능성을 증폭시키고 있음에 대한 실증적 증거를 제공함으로써 기존연구들에서 최고경영자 교체원인으로 제시되어온 저조한 경영성과와 기업지배구조 변수 이외에도 경영자의 이익조정 행위 또한 경영자 교체의 직접적인 요인 중 하나가 될 수 있음을 시사한다. 이는 또한 외부투자자들에게 최고경영자의 교체를 경험하는 기업들의 정보 투명성에 대해 보다 신중한 자세를 견지할 것을 요구하며 투자가 이루어진 후에도 경영자의 보고이익 조정 성향을 면밀히 관찰하고 견제할 필요가 있음을 제시한다.

Abstract

Managers engage in earnings management using accounting discretions within the boundaries of GAAP. Managerial accounting discretions are sometimes intended to enhance the predictability of future cash flows or create positive influences on firm values. Other times, managers attempt to use accounting flexibilities to improve opportunistic benefits. Opportunistic earnings management activities to maximize manager's private gain tend to mitigate the reliability of accounting information, resulting in the detriments to the future value of the firm. Strong corporate governance is expected to play a role in safe-guarding the interests of various stakeholders including equity holders, who monitor and check managerial opportunism through internal control system. The purpose of this study is to investigate whether internal controls work to discipline opportunistic managerial earnings management under the Korean context. Earnings management provides a rich setting in which to examine whether internal controls work to discipline managers who engage in self-interested but potentially value-destroying activities. We examine firm-year observations selected over the period of 2001 through 2006, for which CEO's job tenure information is available. We conduct various tests to see whether earnings management during a CEO's job tenure as reflected in both absolute discretionary accruals and abnormal real activities increases the likelihood of CEO turnover. We also examine whether the connection between earnings management and the likelihood of CEO turnover differ between the voluntary and forced CEO turnover. Our main findings are as follows. First, we find that the average annual value of absolute discretionary accruals during CEO's tenure is significantly related with the increases in the probability of CEO turnover after controlling for the firm performance and corporate governance metrics. However, we do not observe significant association between the proxies of real earnings management and the likelihood of CEO turnover. These observations indicate that the managerial earnings management activities tend to trigger disciplinary actions from internal control systems, with differing degrees depending on the type of devices used for managing earnings by managers. Second, we find that absolute discretionary accrual is positively and significantly related to the hazard rate for forced CEO turnover, but insignificantly related in voluntary turnovers, which implies that the likelihood of forced CEO turnover is a function of the degree of earnings management. This basic result holds through several test specifications, including logistic regressions and competing-risks hazard models. These results suggest that extreme managerial earnings management activities provide reasons to ouster CEOs by force, a manifestation of disciplinary mechanism exercised by sound internal control system. Above results provide an empirical evidence in support of conjectures that CEO's opportunistic earnings management activities serve as one of the causes leading to forced CEO turnover. This finding contributes to the existing literature on the relationship between CEO turnover and earnings management in that it implies the causal relationships between the two constructs may be bidirectional rather than one directional. In other words, our study indicates that accounting discretion is not only used as a means for a CEO to enhance his or her personal benefits, but a sound internal control system may interpret it as a signal of managerial inefficiency.

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