This study examines the influence of corporate tax aggressiveness on corporate debt policy (the debt-substitution effect) and the influence of outside directors on both debt and the debt-substitution effect. Based on a sample of 6967 firm-year observations over the 2001–2010 period, we find that tax aggressiveness is negatively correlated with debt. We also observe a negative correlation between debt and the proportion of outside directors on the board, and find that outside directors magnify the debt-substitution effect. Finally, we obtain similar results in analysis based on firms' debt issuance decisions.

We examine financial distress and tax aggressiveness spanning the global financial crisis (GFC) of 2008 and the impact of the interaction between board independence and firm-specific financial distress on tax aggressiveness. Our regression results show that both financial distress and the GFC are positively associated with tax aggressiveness. More importantly, we find that the positive association between financial distress and tax aggressiveness is magnified by the GFC. We also observe that the interaction between board independence and financial distress is positively associated with tax aggressiveness. Our results are robust to multiple measures of financial distress and tax aggressiveness.

The objective of this paper is to evaluate whether dividend imputation, whereby tax credits may be passed on to shareholders for corporate tax paid, impacts corporate tax avoidance. This is undertaken with a pooled cross-sectional research design evaluating differences in tax avoidance across firms where there are significant differences in corporate tax avoidance incentives. Specifically, potential differences arise between firms paying dividends with tax credits, paying dividends without tax credits, and not paying dividends. Results suggest that firms paying dividends with tax credits attached are less likely to engage in tax avoidance with an average cash effective tax rate up to 16.9 percentage points higher than firms that pay dividends without tax credits, and up to 14.7 percentage points higher than firms that do not pay dividends at all. Accordingly, this provides insights into the effectiveness of dividend imputation in mitigating corporate tax avoidance, as well as providing support for the continuance of dividend imputation in Australia. Additionally, a positive association is found to exist between outside directors and corporate tax avoidance, extending to firms paying dividends with tax credits where dividend imputation is expected to mitigate such a relation. In combination, these results suggest heterogeneity of costs and benefits of tax avoidance and this is a challenge in evaluating corporate tax aggressiveness generally, and the impact of corporate governance on corporate tax avoidance in particular.