Introduction

As current international investment law regulates the conduct of heterogeneous actors, one debated issue is how to combine their different interests and expectations, in particular those of the private investors, and those of the host States, which are in principle public ones. Defining public interests at an international law level is an old problem to which a solution has not yet been found. In international investment law the existence of public interest tends to be required as one of the typical requirements that a State has to satisfy if it wishes to ...