Trade in services, far more than trade in goods, is affected by a variety of domestic regulations, ranging from qualification and licensing requirements in professional services to pro-competitive regulation in telecommunications services. Experience shows that the quality of regulation strongly influences the consequences of trade liberalization. WTO members have agreed that a central task in the ongoing services negotiations will be to develop a set of rules to ensure that domestic regulations support rather than impede trade liberalization. Since these rules are bound to have a profound impact on the evolution of policy, particularly in developing countries, it is important that they be conducive to economically rational policy-making. This book addresses two central questions: What impact can international trade rules on services have on the exercise of domestic regulatory sovereignty? And how can services negotiations be harnessed to promote and consolidate domestic policy reform across highly diverse sectors? The book, with contributions from several of the world's leading experts in the field, explores a range of rule-making challenges arising at this policy interface, in areas such as transparency, standards and the adoption of a necessity test for services trade. Contributions also provide an in-depth look at these issues in the key areas of accountancy, energy, finance, health, telecommunications and transportation services.