This Manual provides a detailed introduction to the issues addressed in the United Nations Model Double Taxation Convention between Developed and Developing Countries as revised in 2001. The goal of the Manual is to assist developing countries and economies in transition to negotiate tax treaties among themselves and with developed countries. The first edition of this Manual was published in 1979, which will be of interest to those wishing to study more deeply the history of double taxation avoidance agreements. The Manual as revised consists of three parts. Part One contains an analytical and historical overview of international double taxation and tax avoidance and evasion. Part Two contains in consolidated form the guidelines formulated by the Group of Experts. Part Three contains suggestions relating to procedural aspects of tax treaty negotiations and to the application of the guidelines. The Annex to the Manual reproduces the texts of the following model treaties: (1) the Model Bilateral Convention for the Prevention of the Double Taxation of Income (Mexico Draft, 1943); (2) the Model Bilateral Convention for the Prevention of the Double Taxation of Income and Property (London Draft, 1946); (3) the Model Convention for the Avoidance of Double Taxation Between Member Countries and Other Countries Outside the Andean Sub-region (Andean Model); (4) the OECD Model Convention on Income and on Capital (OECD Model, 2000); (5) the Convention on Mutual Administrative Assistance in Tax Matters (OECD and Council of Europe, 1988); and (6) the United Nations Model in Practice.