Päivi Leino-Sandberg is Professor of Transnational European Law, University of Helsinki, and Deputy Director of the Erik Castrén Institute of International Law and Human Rights. She previously worked for 10 years as a legal adviser for the Finnish government and continues to advise the Parliament of Finland and other institutions. Her writings have appeared in leading journals and have been quoted by the EU Court and the German Federal Constitutional Court. She has won access to documents cases in EU Courts. She has held visiting positions e.g. at the EUI, NYU Law School, Humboldt University Berlin and iCourts in Copenhagen.Peter L. Lindseth is the Olimpiad S. Ioffe Professor of International and Comparative Law, University of Connecticut School of Law, where he is also Director of Graduate, International, and Non-JD Programs. A legal scholar and historian, his work explores the evolution of governance structures and public law, particularly as they relate to European integration and the modern administrative state. His academic career began at Columbia Law School, and he has also held numerous visiting positions including at Yale Law School, Princeton, the French Conseil d'Etat, the American Academy in Berlin, the Max-Planck-Institut für europäische Rechtsgeschichte, and other universities across Europe.