Upon request by the JURI Committee, this study investigates the law and practice of arbitration across the European Union and Switzerland. It includes an in-depth examination of the practice and the laws relating to arbitration in each Member State of the European Union and Switzerland, as well as an examination of the involvement of Member States and the European Union in arbitration. While substantial harmony exists across the European Union at both the level of law and practice, the Study finds that arbitration in the European Union is predominantly regional, rather than transnational. It also concludes that investment arbitration is often a beneficial feature of investment agreements, although the terms of such agreements must be carefu...