Aurelia Colombi Ciacchi is a Senior Researcher at the Law Faculty and a Senior Lecturer at the Hanse Law School, University of Bremen. She specializes in comparative law, European private law, constitutional and private law, contract and liability law.Stephen Weatherill is the Jacques Delors Professor ofEuropean Community Law at the University of Oxford. He is also the Associate Director of the Centre for the Advanced Study of European and Comparative Law. He is the author of numerous articles and books, including Law and Integration in the European Union (1995, OUP), and Weatherill and Beaumont's EU Law (3rd edition 1999, Penguin), and is the editor of The Harmonisation of European Contract Law: Implications for European Private Laws, Business and Legal Practice (co-edited with S. Vogenauer, 2006, Hart).