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Leaders In The Expansive And Restrictive Interpretation Of Investment Treaties: A Descriptive Study Of Isds Awards To 2010, Gus Van Harten

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This article provides an empirical analysis of interpretive discretion in investor–state dis- pute settlement (ISDS). Since the late 1990s, foreign investors have brought hundreds of investment treaty claims against states, leading to numerous awards in which arbitrators have interpreted investment treaties. Arbitrators may resolve ambiguities in the treaties in expansive or restrictive ways, thereby affecting the compensatory promise of ISDS for foreign investors and corresponding risks for states. Which arbitrators have contributed most to expansive or restrictive approaches? To examine this question, data was analysed on arbitrators’ resolutions of contested legal issues, such as the permissibility of parallel or minority …