In the past few years, there has been a dramatic increase in the number of international investment treaty arbitrations, many involving multi-billion dollar claims. In an environment where new awards and decisions are published weekly, The Investment Treaty Arbitration Review provides a useful guide on the most recent developments, as well as the debate and context behind those developments. In the latest edition of The Review, NERA Managing Director Dr. Jeff D. Makholm, and former Associate Director Erin B. McHugh—the only economists to contribute to the book—write about the benefits of using economic and statistical tools to value damages and establish causation.