The current tax treaty network was developed in the 1920s and 1930s in order to prevent double residence/source taxation. This kind of double taxation rarely exists any more because most countries have adopted either an exemption system or a foreign tax credit regime in their domestic...

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 new OECD Multilateral Instrument to amend tax treaties (MLI) is an important innovation in international law. Hitherto, international economic law was built primarily on bilateral treaties (e.g., tax treaties and BITs) or multilateral treaties (the WTO agreements). The problem is that in...