In tema di arbitrato degli investimenti e giurisdizione dello Stato

This essay analyzes the investor-State arbitration in connection with concepts of civil procedure law, as deriving from the State sovereignty. The author notes that the consent to investment arbitration enhances the application of the party autonomy principle. As a result, it may limit the long-established capacity of States with respect to internal remedies in investment disputes. At the same time, it is highlighted the risk of inconsistencies with the doctrine of res judicata, mainly when objected in investment arbitration proceedings on the basis of host State courts’ decisions. This can lead to possible different solutions on the same issue by other State courts in case of challenge of the awards or opposition to their enforcement. The last part of the study analyses the “European approach” to investor-State arbitration and the proposals aiming at preventing conflicts of decisions rendered in investment arbitrations and State court proceedings.