Defence date: 22 January 2014Examining Board: Professor Dennis Patterson, European University Institute Professor Petros Constantinos Mavroidis, European University Institute Professor Georgios Pavlakos, University of Antwerp Professor Mathias Audit, Université Paris Ouest-Nanterre La Défense.Co-laureate of the Grand Prix Jean Bastin in 2015This thesis guides the reader through contemporary problems of the law of sovereign debt and default. Adopting a horizontal approach to the field, the state in its double role of being a borrower from the market and a regulator of the market remains at the center of this inquiry. How do problems related to sovereign debt challenge state institutions, constitutional principles and even the very conce...