회계처리방법이 이익관리에 미치는 영향

The purpose of this study is to evaluate which of the more sophisticated accrual models is the influence factors of earnings management on managers by classifying samples into income -decreasing and income-increasing groups using accounting procedure choices(inventory, and depreciation method). Existing models range from simple models in which discretionary accruals are measured as total accruals, to sophisticated models that attempt to separate total accruals into discretionary and nondiscretionary components. Furthermore we decompose accruals into four categories by time period(current and long-term) and manager control(discretionary and nondiscretionary), consistent with Teoh et.al.(1998). The results show that there are a significant differences between income-decreasing and income-increasing groups in nondiscretionary accruals and nondiscretionary long-term accruals only. Most of accounting accruals could be explained by discretionary accruals and current accruals, and long-term accruals are significantly negative in all years except with 0 year experiencing a sharp increase. We find that there are a significant negative correlations between accounting accruals, discretionary accruals, and discretionary long-term accruals, consistent with most prior studies. We also find an evidences that managers of failing firms manipulate reporting earnings using extraordinary items. The results also show that there are greater differences for nondiscretionary accruals(long-term accruals) than discretionary accruals(current accruals) between both groups.