Over the past two decades, governments around the world have been tackling corporate tax avoidance, aiming to clamp down on profit shifting and safeguard tax revenues. Two popular policy approaches to address firms’ tax avoidance have been the tightening of regulations and enhancing firm tax transparency. In this panel, we will explore the extent to which these measures have been effective and how firms have responded, based on recent empirical literature. We will highlight intended as well as unintended outcomes.