International investment arbitral tribunals are increasingly tasked with resolving regulatory disputes. This relatively new form of dispute involves a challenge by a foreign investor to a host state's generally applicable regulation, enacted in good faith to promote the public interest but...

Since the turn of the century, investment treaty arbitration (ITA) tribunals have begun citing past decisions with increasing frequency. They do so despite the absence of any formal doctrine of stare decisis and the presence of structural obstacles to the use of precedent in this context....