Introduction

This is the fourth round of Reporters' Studies undertaken in the context of the American Law Institute project 'Principles of World Trade Law: The World Trade Organization'. The aim of the project is to provide systematic analysis of WTO law based in both economics and law. This year's focus has been on disputes that came to an administrative end during the years 2004 and 2005, either because they were not appealed or because the appeal process had come to an end. Each dispute has been evaluated jointly by an economist and a lawyer. Their general task has been to evaluate whether the ruling 'makes sense' from an economic as well as a legal point of view, and, if not, whether the problem lies in the legal text or in the interpretation thereof. The teams of lawyers and economists do not always cover all issues discussed in a case, but they seek to discuss both the procedural and the substantive issues that form the 'core' of the dispute as they see it.