The World Trade Organization (WTO) Agreement covers the vast majority of international commerce in goods and services. The Agreement covers not only measures that directly affect trade, such as import tariffs and import quotas, but potentially almost any type of internal measure with an impact on trade. Thus WTO legal texts are by necessity expressed in vague terms, and in need of continuous interpretation. The overarching aim of the project Legal and Economic Principles of World Trade Law, led by the American Law Institute, is to contribute to the analysis of WTO law in not only law but also...