The effect of the mandatory disclosure of corporate tax returns on reporting bias
How do investor reactions to the mandatory disclosure of firm tax information influence managers' reporting choices? To answer this question, we build a structural model of reporting bias, which we test with a unique data set of Turkish firms that have been mandated to publicly disclose their tax returns since 2009. We find that both book and tax income numbers are informative to investors. Structural estimates are consistent with disclosure of the tax report reducing both market incentives to manage book earnings and investor uncertainty about underlying firm value. Tax disclosure is associated with higher reported tax income, though the increase is not statistically significant. Counterfactual estimates suggest that book‐tax‐conformity could change financial and tax reporting biases, but lead to a lower quality information environment relative to the separate disclosure of book and tax reports.