Any proposal for adoption of a unitary tax (UT) system ought to clear the first and most common hurdle of its compatibility, or lack of it, with the current norms in the international tax system – specifically, the current tax treaty network. This paper argues that unitary taxation is...

The OECD has been struggling to respond to countries that wish to tax large US technology companies on the basis of where their consumers live. The current OECD work program on digitalization is unlikely to produce a stable consensus or prevent countries from following the lead of France, India,...

The Tax Cuts and Jobs Act (TCJA) includes several provisions that may be viewed as potential violations of US tax treaties. However, most of those potential violations, such as new IRC section 951A and to a large extent new IRC section 59A, are covered by the Savings Clause (US model article...

Customary international law is law that “results from a general and consistent practice of states followed by them from a sense of legal obligation.” “International agreements create law for states parties thereto and may lead to the creation of customary international law when such...

Since the 1990s, the US tax treaty network has expanded to include most large developing countries. However, there remains a glaring exception: The US only has two tax treaties in Latin America (Mexico and Venezuela), and one pending tax treaty (Chile). The traditional explanation for why the US...

The OECD's Base Erosion and Profit Shifting (BEPS) project promises to bring about the most fundamental changes in the international tax regime since its inception in the 1920s. The fundamental idea behind the various BEPS projects is that the OECD has fully embraced the idea that double...

The international tax regime is almost a hundred years old. The two principles it is based on (the benefits principle and the single tax principle) were developed in the 1920s and 1930s. The regime functioned reasonable well until the 1980s, where globalization led to tax competition that...

In recent years, various US international tax proposals have been advanced on the basis that we should follow the lead of our major trading partners. For example, it has been argued that we should adopt a “territorial” tax system (really, an exemption for dividends from controlled...