International Investment Arbitration: Substantive principles

By Campbell McLachlan, Laurence Shore & Matthew Weiniger, Published by Oxford University Press, May 2017

The legal principles that have developed in investment arbitration are subject to intense debate and are still in a state of flux. While tribunals routinely state that they are applying principles of public international law, many principles applied have only been developed recently, and tribunals are often guided more by the approaches taken by other tribunals than by pre-existing public international law doctrines. This work critically reviews the substantive principles of international law applied by investment tribunals, and describes the present state of the law created, applied and analyzed by tribunals. This updated second edition takes account of arbitration awards rendered since 2007. Available at