This colloquium will offer students an opportunity to examine current tax policy issues in depth and at an advanced level, with discussions led by policymakers, economists and other tax experts. While other current policy issues will be discussed, the primary focus of the course will be an exploration of international tax reform, surrounding the current policy debate over whether the United States should adopt a territorial tax system or retain a worldwide tax system. The course will discuss various international reform proposals at a detailed level and examine the economic, tax policy and political considerations underlying the decisions that have been made in each proposal. The course will begin with a brief overview of our current international tax system and a comparison to other countries’ systems. It will explore the economic and policy literature surrounding the issues of economic welfare and competitiveness. The course will also examine other current tax policy issues, such as tax expenditures, cost recovery, and energy tax incentives. Reading materials generally will be supplied and will include economic and tax policy papers, legislative proposals, and technical explanations. The course is intended to be highly interactive with students discussing design and policy issues with several of the leading experts in the field. The grade for this course will be based primarily on papers that students submit, addressing policy topics discussed by the guest speakers. Useful class participation will be taken into account as a plus in determining the final grade. There will be no final exam.