Investment in internal auditing and governance characteristics: Evidence from statutory internal auditors in South Korea

Purpose Based on 3,775 firm-year observations from 2009 to 2013 using publicly available disclosure data for Korean listed firms, this study examines whether and how firm-level governance characteristics are associated with investment in internal auditing proxied by compensation and the number of statutory internal auditors. Design/methodology/approach The authors investigate the association between governance characteristics and investment in internal auditing proxied by compensation and the number of statutory internal auditors. Findings The authors find that firms with greater ownership of the largest shareholders and with a higher proportion of outside directors invest more in internal auditing. These results indicate that firms with higher incentive and demand for monitoring are more likely to invest more in internal auditing. The authors further find that the positive effect of the largest shareholder ownership (board independence) on investment in internal auditing is attenuated in firms with greater board independence (ownership of the largest shareholders) suggesting that the complementary effect of the two governance mechanisms associated with internal auditing weakens as they function simultaneously. Research limitations/implications The results provide regulators and investors with a clear picture of the governance characteristics of firms associated with investment in internal auditing. The results imply that both the largest shareholders and the outside board of directors play a significant role in resource allocation in internal auditing within a firm. The effect of allocation, however, can be attenuated contingent upon the combined characteristics of governance mechanisms. Originality/value Using large amounts of public archival data, this study adds to the extant literature on firm characteristics associated with investment in internal auditing. This study also contributes to the literature by expanding the scope of research on executive compensation to the locus of statutory internal auditors.