From Gabriel Zucman:
This article attempts to estimate the magnitude of corporate tax avoidance and personal tax evasion through offshore tax havens. In the United States, corporations book 20% of their profits in tax havens – a tenfold increase since the 1980s – and tax avoidance reduces corporate tax revenues by up to a third. Globally, 8% of the world’s personal financial wealth is held offshore, costing more than $200bn to governments annually. Despite ambitious policy initiatives, profit shifting to tax havens and offshore wealth are rising. I discuss the recent proposals made to address these issues, and I argue that the main objective should be to create a world financial registry.