Investment treaties are some of the most controversial instruments of global economic governance. This book integrates legal, economic, and political perspectives to offer the first comprehensive analysis of the political economy of the investment treaty regime, and contextualises the investment treaty regime in its broader socio-economic context.

Investor-State Dispute Settlement (ISDS) is a provision in Bilateral Investment Treaties (BITs) and other international investment agreements that allows investors to enter arbitration with states over treaty breaches. ISDS has become controversial in the United States and our negotiating partners; critics, including some governments, have argued that ISDS is unnecessary, while others insist it is illegitimate as public policy. Treaty-based investment protection represents a major advance in the fair treatment of aliens and the peaceful resolution of disputes. Given the alternatives, withdrawing from investment treaties—the logical conclusion of the critics’ position—would likely have negative consequences for economic growth and the rule of law. This report is an empirical review of ISDS, based on the record of disputes under existing investment treaties.

This open access book examines the multiple intersections between national and international courts in the field of investment protection, and suggests possible modes for regulating future jurisdictional interactions between domestic courts and international tribunals. The current system of foreign investment protection consists of more than 3,000 international investment agreements (IIAs), most of which provide for investment arbitration as the forum for the resolution of disputes between foreign investors and host States. However, national courts also have jurisdiction over certain matters involving cross-border investments. International investment tribunals and national courts thus interact in a number of ways, which range from harmonious co-existence to reinforcing complementation, reciprocal supervision and, occasionally, competition and discord. The book maps this complex relationship between dispute settlement bodies in the current investment treaty context and assesses the potential role of domestic courts in future treaty frameworks that could emerge from the States current efforts to reform the system. The book concludes that, in certain areas of interaction between domestic courts and international investment tribunals, the "division of labor" between the two bodies is not always optimal, producing inefficiencies that burden the system as a whole. In these areas, there is a need for improvement by introducing a more fruitful allocation of tasks between domestic and international courts and tribunals - whatever form(s) the international mechanism for the settlement of investment disputes may take. Given its scope, the book contributes not only to legal analysis, but also to the policy reflections that are needed for ongoing efforts to reform investor-State dispute settlement.

Investor-State disputes are increasing and damage awards are often significant. It is thus no surprise that the investor-State dispute settlement (ISDS) system has come under scrutiny. Perceptions have arisen that ISDS is inconsistent, lacks transparency, and is simply unfair. This book delves into the ongoing worldwide debate and discussions regarding the ISDS system. Drawing contributors from around the world, the authors provide insights on critical topics and address the key question facing the ISDS system and the international community it serves: Should the present ISDS system be reformed, replaced, or simply remain as is? The contributors represent points of view ranging from academia to practice to governmental entities, addressing such topics as: the possible consequences of wholesale replacement or elimination of the current ISDS system; mediation as an alternative to resolve ISDS disputes; the creation of a multinational investment court or appellate review mechanism; lack of an early dismissal mechanism to eliminate meritless claims; issues regarding arbitrators, including their appointment and ethical obligations; how investors may retain their right to pursue claims for violations of investment protection following termination of an agreement; a State’s right to assert a counterclaim against an investor-claimant; the role of ISDS in promoting and protecting renewable energy production; the liability of State-controlled entities; the effects and implications of third-party funding; the duty to mitigate damages in the light of excessive damages awards; and improvements and issues relating to post-award enforcement, duration, and cost of ISDS. This book considers the ongoing deliberations and reform measures proposed by UNCITRAL’s Working Group III and provides insights into how several geographic regions and economic cooperation areas have sought to address the question of reform of the ISDS system, including the European Union, the Middle East, and the new United States-Mexico-Canada Agreement. With its much-needed and deeply informed balancing of investor and State rights and duties, this book will be welcomed by all who practise in the ISDS field, including arbitrators, State governments and non-governmental organizations, regional economic organizations, and international investors.

The Vienna Convention on the Law of Treaties (VCLT) – as the ‘treaty on treaties’ – has achieved a rich and nuanced track record of use in international law. It has now been over fifty years since the VCLT was opened for signature in 1969, and over forty years since it entered into force in 1980. As of 2022, the VCLT has been ratified by 116 States and signed by 45 others, with some non-ratifying States also recognising parts as reflective of customary international law. In the intervening decades, the VCLT has had a profound influence on the interpretation, application and development of international investment law, including in the context of investment treaty arbitration. This book presents the first consolidated analysis of how the VCLT has informed the practice of international investment law and the resolution of investor-State disputes, and the role that the VCLT may play in shaping the future of this field. The diverse contributors to this book are scholars and practitioners from around the world, who offer a variety of perspectives on the nexus between the VCLT, international investment law and investor-State dispute settlement (ISDS). Each chapter demonstrates how approaches to key issues of treaty law in investment treaty arbitration diverge or converge from the VCLT and approaches of other international courts, as well as the lessons that investment treaty arbitration could derive – or even offer – for the interpretation and application of the VCLT rules in other settings. Their insights and analyses consider aspects such as the role of the VCLT for: interpretation of more specific approaches to treaty law drafted by treaty negotiators; treaty application in circumstances of contested State territory or succession challenges; temporal challenges arising in treaty interpretation; the status of bilateral investment treaties between European Union Member States and related termination endeavours; questions concerning the validity, termination and amendment of investment treaties, including as part of ongoing ISDS reform processes; current multilateral reform proposals, including the possibility of an appellate mechanism or a multilateral investment court; grappling with the challenge of fragmentation in international investment law, including the role of prior decisions in treaty interpretation, the challenges introduced by treaty conflict and the multitude of approaches that may be taken by national courts when implementing treaties like the New York Convention; and treaty interpretation and drafting as aided by emerging technologies, such as data analytics, machine learning, smart contracts and blockchain. The book’s appendix provides a highly valuable tabular summary of ISDS arbitral practice relating to the VCLT, collating key references from over 350 different procedural orders, decisions and awards. By revisiting the role that the VCLT has played in the development of this field of law, this invaluable book unlocks insights into how the VCLT might be used to support its ongoing development and the resolution of the next generation of investor-State disputes. This book is essential reading for a variety of stakeholders, including arbitrators, counsel, scholars and government officials, who will benefit from its in-depth and practical analysis of the VCLT’s relevance to and impact on investment law and investor-State arbitration and its role in shaping where this field of public international law might be headed in the decades to come.

Treaty-based investor-state dispute settlement (ISDS) is attracting increasing public debate. Particular concerns involve treaty provisions allowing investors from the home state to initiate arbitration claims directly against the host state for allegedly violating substantive rights (eg relating to expropriation) guaranteed by regional and bilateral investment treaties or free trade agreements.Some commentators and a few countries now favour abandoning such protections altogether, leaving foreign investors to the vicissitudes of domestic law and court procedures in the host state, or of any inter-state process under customary international law or as agreed in investment treaties. Others suggest that treaty practice and international arbitrators' rulings are adequate, so no change is needed to this system. A third group seeks a middle way, proposing various procedural and substantive law reforms to re-balance private versus public interests involved in promoting and protecting cross-border investment.This paper is based on an Open Letter derived from an online form publicised among those familiar with such international investment law issues. Almost all favoured the middle way, with considerable agreement on several possible reforms. These insights should prove useful in framing the ongoing debate, negotiations over new investment treaties, and perhaps even investor-state arbitration proceedings relating to existing treaties.