2003. Environmental Leaders and Laggards in Europe. Why There is (Not) A Southern Problem, London: Ashgate.

2002. States and Regions in the European Union. Institutional Adaptation in Germany and Spain, Cambridge: Cambridge University Press.

i.V. The Disparity of European Integration. Revisiting Neofunctionalism in Honor of Ernst Haas, Sonderheft des Journal of European Public Policy, 2005.

2003. Law, Politics, and the Citizen. EUSA State of the European Union, Vol. 6, herausgegeben mit Rachel Cichowski, Oxford: Oxford University Press.

i.V. Undermining Democratic Governance in the Member States? The Europeanization of National Decision-Making, mit Carina Sprungk. In The Copenhague Dialogue on Democracy in the European Union, herausgegeben von Ronald Holzhacker and Erik Albaek.

i.E. How the European Union Interacts With Its Member States. In Member States and the European Union, herausgegeben von Simon Bulmer and Christian Lequesne, Oxford: Oxford University Press.

2003. Einhaltung von Recht jenseits des Nationalstaats. Zur Implementationslogik marktkorrigierender Regelungen in der EU, mit Tobias Hofmann and Carina Sprungk. Zeitschrift für Internationale Beziehungen, 10 (2), 247-290.

2003 Conceptualizing the Domestic Impact of Europe, mit Thomas Risse. In The Politics of Europeanization, herausgegeben von K. Featherstone und C. Radaelli, Oxford: Oxford University Press: 55-78.

2003 Brussels between Bern and Berlin: Comparative Federalism Meets the European Union, mit Madeleine Hosli. Governance, 16 (2), 179-202.

2002. Non-State Actors and the Provision of Common Goods. Compliance with International Institutions. In Common Goods: Reinventing European and International Governance, herausgegeben von A. Héritier, Lanham, MD: Rowman & Littlefield, 155-178.

2002. Pace-Setting, Foot-Dragging, and Fence-Sitting. Member State Responses to Europeanization. Journal of Common Market Studies, 40 (2): 193-214.

2001. Non-Compliance in the European Union. Pathology or Statistical Artefact? Journal of European Public Policy 8 (5): 803-824.

2001. Europeanization and Territorial Institutional Change. Towards Cooperative Regionalism? In Transforming Europe. Europeanization and Domestic Change, herausgegeben von J. A. Caporaso, M. Green Cowles und T. Risse, Ithaca, NY: Cornell University Press, 137-158.

2000. When Europe Hits Home. Europeanization and Domestic Change, mit Thomas Risse, European Integration online Papers (EIoP), 4 (15), http://eiop.or.at/eiop/texte/2000-015a.htm.

2000. Improving Compliance through Domestic Mobilization? New Instruments and the Effectiveness of Implementation in Spain. In Implementing EU Environmental Policy. New Approaches to an Old Problem, herausgegeben von C. Knill und A. Lenschow, Manchester: Manchester University Press, 222-250.

2000. From Competitive Regionalism to Cooperative Federalism. The Europeanization of the Spanish State of the Autonomies. Publius, the Journal of Federalism, 30 (2): 17-42.

2000. Europäisierung und innerstaatlicher Wandel: Zentralisierung und Entparlamentarisierung? Politische Vierteljahresschrift, 41 (2): 225-250.

2000. Why There Is No Southern Problem. On Environmental Leaders and Laggards in the European Union. Journal of European Public Policy, 7 (1): 141-162.

1999. Towards Convergence in Europe? Institutional Adaptation to Europeanisation in Germany and Spain. Journal of Common Market Studies, 37 (4): 573-596.

1998. Organising Babylon. On the Different Conceptions of Policy Networks. Public Administration, 76 (2): 253-273.

1998. Shifting or Sharing the Burden. The Europeanisation of Environmental Policy in Spain and Germany. European Planning Studies, 6 (5): 537-553.

1998. The Greening of a Polity? The Europeanisation of Environmental Policy-Making in Spain. South European Society and Politics 2 (1): 65-92.

1998. Le reti di attori pubblici e privati nella regolazione europea. Stato e Mercato 54, Dezember 1998: 389-432.
1997. Does European Integration Really Strengthen the State? The Case of the Federal Republic of Germany. Regional and Federal Studies 7 (3): 87-113.

1997. What's So Special About Policy Networks? An Exploration of the Concept and Its Useful¬ness in Studying European Governance. European Integration online Papers (EIoP) 1 (16): http://eiop.or.at/eiop/texte/1997-016a.htm.

1997. Zur (Ir-)Relevanz der Postmoderne für die Integrationsforschung. Eine Replik auf Thomas Diez' Beitrag 'Postmoderne und europäische Integration'. Zeitschrift für Internationale Beziehungen 4 (1): 125-137.

i.E. Public-Private Partnerships. Effective and Legitimate Tools of International Governance?, mit Thomas Risse. In The Reconstitution of Political Authority in the 21st Century, herausgegeben von Edgar Grande und Louis Pauly

i.E. Restructuring or Reinforcing the State: The German Länder as Transnational Actors in Europe. In Germany's Power in International Politics, herausgegeben von A.-M. LeGloannec.

2003 Shaping and Taking EU Policies. Member State Responses to Europeanization, Queen's Papers on Europeanization 2/2003, Belfast: Queens University, http://www.qub.ac.uk/ies/onlinepapers/poe2-03.pdf.

2003 What Can Federalism Teach Us About the European Union. The German Experience. Constitutional On-Line Papers 17/03, London. Federal Trust, UK http://www.fedtrust.co.uk/eu_constitution.

2003 Law, Politics and Society in Europe: An Introduction, mit Rachel Cichowsky. In State of the European Union Volume 6: Law Politics and Society, Oxford: Oxford University Press.

2003 Guarding the Treaty. The Commission’s Strategies in Enforcing European Law. In State of the European Union Volume 6: Law Politics and Society, Oxford: Oxford University Press.

2002 Demokratien im Wandel der Europäisierung. In Demokratien in Europa, herausgegeben von W. Lamping und I. Katenhusen, Opladen: Leske + Budrich: 181-204.

2002. Europäisierung und die Transformation der Nationalstaaten. Mit Thomas Risse. In Entgrenzte Märkte – grenzenlose Bürokratie, herausgegeben von V. Schneider, Frankfurt a.M.: Campus: 86-108.

2002 Die Wirkung internationaler Institutionen: Von der Normanerkennung zur Normeinhaltung. Mit Thomas Risse. In Regieren in internationalen Institutionen. Festschrift für Beate Kohler-Koch, herausgegeben von M. Jachtenfuchs und M. Knodt, Opladen: Leske + Budrich: 141-182.

2002. Kooperation statt Wettbewerb. Die Regionen vor der Herausforderung der Europäisirung. In Regionales Europa – Europäisierte Regionen: Eine Bilanz von 15 Jahren Regionenforschung, Mannheimer Jahrbuch für Europäische Sozialforschung 6, herausgegeben von T. Conzelmann und M. Knodt, Frankfurt a/M et al.: Campus: 123-139.

2001. Föderative Staaten in einer entgrenzten Welt: Regionaler Standortwettbewerb und gemeinsames Regieren jenseits des Nationalstaates. In PVS Sonderheft „Föderalismus“, 32/2001, herausgegeben von A. Benz und G. Lehmbruch: 363-388.

2001. Pace-Setting, Foot-Dragging, and Fence-Sitting. Member State Responses to Europeaniza¬tion, Queen's Papers on Europeanization 4/2001, Belfast: Queens University, http://www.qub.ac.uk/ies/onlinepapers/poe4-01.pdf.

2001. The Post-Nice Agenda of the European Union. What’s the Problem, How to Deal with It, and What to Avoid. Co-authored with Thomas Risse. Policy Papers Series on Consitutional Reform of the European Union 1/2001. Florence: Robert-Schuman-Centre for Advanced Studies. 2001, http://www.iue.it/RSC/EU/Post-Nice01.pdf.

2000. Who Is Afraid of a European Federation? How to Constitutionalize a Multi-Level Governance System, mit Thomas Risse. In What Kind of Polity? Responses to Joschka Fischer, herausgegeben von C. Joerges, Y. Meny und J. H. H. Weiler, Florence: Robert Schuman Centre for Advanced Studies, 45-59.

2000. When Europe Hits Home. Europeanization and Domestic Change, mit Thomas Risse, Working Paper, RSC-WP 2000/56, European University Institute, Florence.

2000. Private Actors on the Rise? The Role of Non-State Actors in Compliance with International Institutions, Preprint 2000/14, Max-Planck-Projectgroup on Common Goods, Bonn, http://www.mpp-rdg.mpg.de/publik1.html.

1999 Why There Is No Southern Problem. On Environmental Leaders and Laggards in the European Union, RSC Working Paper No. 99/16, Florence: European University Institute

1997. Policy Networks - A New Paradigm for European Governance? RSC Working Paper No. 97/19, Florence: European University Institute.

i.E. Review of ‘European Union Environment Policy and New Forms of Governance’, by Hubert Heinelt, Tanja Malek, Randall Smith, and Annette E. Töller, South European Society and Politics.

2001. Review of ‘Environmental Governance in Europe’, by Albert Weale, Geoffrey Pridham, Michelle Cini, Dimitrios Konstadakopulos, Martin Porter, and Brendan Flynn, South European Society and Politics, 6 (3): 147-149.

2001. Review of ‘Creating Environmental Policy in the European Union’, by Anthony R. Zito, Oxford Yearbook of European Environmental Law.

2001. Review of ‘El reto del medio ambiente: conflictos e intereses en la política medioambiental europea’, by Susana Aguilar Fernandez, South European Society and Politics 5 (3): 161-163.

2001. Review of ‘Decision-Making in the European Union, by John Peterson and Elizabeth Bomberg, ECSA Review, 14 (1): 8/9.

1999. Review of ‘The New Regionalism in Western Europe. Territorial Restructuring and Political Change’, by Michael Keating, Canadian Journal of Political Science, 32 (4): 800-802.

1999. Review of ‘EU Committees as Influential Policymakers’, herausgegeben von M.P.C.M. Van Schendelen, Public Administration, 77 (3): 683/684.

1998. Rediscovering Policy Networks as a Form of Modern Governance (book review). Journal of European Public Policy 5 (2): 354-359.