Professor Nicolaïdis has published widely on various aspects of international relations and global governance, EU institutional and constitutional debates, EU external relations including with Mediterranean countries and the United States, comparative federalism, issues of identity, justice and cooperation in the international system, the sources of legitimacy in European and global governance, as well as preventive diplomacy and dispute resolution. She has published in numerous journals including Foreign Affairs, Foreign Policy, The Journal of Common Market Studies, Journal of European Public Policy, International Organization as well as in French in Politique Etrangere, Politique Europeenne and Raison Critique. Her latest book publications include: European Stories: Intellectual Debates on Europe in National Contexts, edited with Justine Lacroix, OUP, 2010. Mediterranean Frontiers: Borders, Memory and Conflict in a Transnational Era, edited with Dimitar Bechev, I.B. Tauris, 2009; Under the Long Shadow of Europe - Greeks and Turks in the era of Postnationalism, edited with Kerem Öktem and Othon Anastasakis, The Hague: Brill, 2009; Whose Europe? National Models and the Constitution of the European Union (Oxford University Press, 2003) and The Federal Vision: Legitimacy and Levels of Governance in the US and the EU (Oxford University Press, 2001).