Tarcisio Gazzini, BA (Padova), LLM (Nottingham), PhD (Padova) is Associate Professor at the VU University Amsterdam. He has previously taught at the Universities of Padua and Glasgow. He is a member of the International Law Commission Committee on non-state actors and of the Editorial Board of the Leiden Journal of International Law.Eric De Brabandere, Lic. Jur.(Ghent), LLM (Geneva), Phd (Ghent), is Senior Lecturer in International Law and International Dispute Settlement at Leiden University. He is a member of the Editorial Board of the Leiden Journal of International Law and the Revue Belge de Droit International. He received a three-year grant from the Dutch NWO to research the public/private divide in international investment disputes.

"This book illustrates the continuing evolution of international investment law, both in terms of substantive norms (and their content) but also in terms of sources and their importance...This book will serve as a benchmark which could be revisited with a comparative new snapshot in a few years’ time."-Julien Fouret, Revue québécoise de droit international

• CONTENTS Preface Biographies List of Abbreviations Table of Cases Introduction - Pierre d'Argent I. International Customary Investment Law: Story of a Paradox - Jean d'Aspremont II. Preferential Trade and Investment Treaties - Erik Denters III. The Energy Charter Treaty - Matthew Happold and Thomas Roe IV. Bilateral Investment Treaties - Tarcisio Gazzini V. General Principles of Law and International Investment Law - Stephan W. Schill VI. National Legislation and Unilateral Acts of States - Makane Moise Mbengue VII. International Investment Contracts - Patrick Dumberry VIII. Arbitral Decisions As a Source of International Investment Law - Eric De Brabandere IX. Non-Binding Documents and Literature - Tony Cole Conclusion The Sources of International Investment Law: Concluding Thoughts - Christian J. Tams Index