Ludvig Wier, University of Copenhagen and Gabriel Zucman, University of California, Berkeley

About a decade ago, the world’s biggest economies agreed to crack down on multinational corporations’ abusive use of tax havens. This resulted in a 15-point action plan that aimed to curb practices that shielded a large chunk of corporate profits from tax authorities.

But, according to our estimates, it hasn’t worked. Instead of reining in the use of tax havens – countries such as the Bahamas and Cayman Islands with very low or no effective tax rates – the problem has only gotten worse. Continue reading →