A Meta-Anlysis of Corporate Governance and Earnings Management

In this study، in order to summed up the findings and analyzes on the reasons of the differences between them، meta-analysis method (following Garcia-Meca & Sánchez‐Ballesta، 2009) is implemented on the statistical sample of 49 studies during 2000 to 2014، including 30 foreign studies and 19 studies from Iran. In this article، corporate governance mechanisms are determined as an independent variables in two categories –board of directors including board independence، board size، and CEO duality and ownership structure including insider ownership، concentration، and institutional ownership- and earnings management is determined as a dependent variable. The effect size was calculated in order to determine the relationship between the main variables and also، to detect moderating variables. The findings show، at first، “the type and the sign of accruals” are as moderating variables for relationships between board size، concentration and institutional ownership and earnings management. Second، “the model of accruals” and also “the type of corporate governance system” moderate the relation between board independence and board size and earnings management.