I. INTRODUCTION Most scholarship on international investment law focuses on the extensive network of thousands of bilateral and multilateral investment treaties that have been concluded over the last sixty years. [...]
Alongside now-controversial investment treaties, many states also maintain domestic investment statutes. Although these laws offer protections similar to investment treaties and are increasingly applied in investor-state arbitration, they have--unlike the treaties--attracted limited scholarly scrutiny. This article argues that investment statutes can plausibly be characterized either as unilateral acts in international law or as domestic law. The article examines the significant consequences that follow from these characterizations, providing the first comprehensive analysis of these hybrid statutes.