Complying with Europe: The Impact of EU Minimum Harmonisation and Soft Law in the Member States,
Cambridge: Cambridge University Press (2005), with Gerda Falkner, Oliver Treib, Simone Leiber.

Die Kontrolle der nationalen Rechtsdurchsetzung durch die Europäische Kommission,
Politik-Verbände-Recht: Umsetzung  europäischer Sozialpolitik. Bd. 3., Schriften des Max-Planck-Instituts für Gesellschaftsforschung, Frankfurt/M.: Campus (2005).

In Search of the Worlds of Compliance: A Brief Reply.
Journal of European Public Policy 14(6), (2007, forthcoming), with Gerda Falkner, Simone Leiber, Oliver Treib.

On Enforcement, Management and Persuasion: Different Logics of Implementation Policy in the EU and the ILO.
Journal of Common Market Studies 2007 45(3): 653-674.

Worlds of Compliance: Why Leading Approaches to EU Implementation Are Only "Sometimes - True Theories",
European Journal of Political Research, 2007 46(3): 395-416, with Gerda Falkner, Oliver Treib .

Two variations on a theme: Different logics of implementation-management in EU and ILO.
European Integration Online Papers 9 (2005).

Opposition through the Backdoor? The Case of National Non-Compliance with European Directives.
West European Politics, 2004 27(3): 452-473, with Gerda Falkner, Simone Leiber, Oliver Treib.

Social Policy: Implementation as a Continuation of Policymaking? In: I. Tömmel/ A. Verdun (eds.), Governance and Policy Making in the European Union,
Boulder: Lynne Rienner (2007, forthcoming.).

Arbeitsmarktpolitik für aktives Altern: Zur Zukunftsfähigkeit Deutschlands im Lichte europäischer Erfahrungen. In: Jürgen Kocka (ed.), Zukunftsfähigkeit Deutschlands. Sozialwissenschaftliche Perspektive. WZB-Jahrbuch, Berlin: edition sigma , 157-177 (2007), with Günther Schmid.

Labour law supervision and enforcement by EU and ILO: Is there one international implementation style? In: Jutta Joachim/ Bob Reinalda/Bertjan Verbeek (eds.): International Organizations and Implementation: Enforcers, Managers, Authorities?, London/ New York: Routledge (2007, forthcoming).

Im Doppelpack die neuen Herausforderungen meistern? IAO- und EU-Kooperation im Wandel. In: Eva Senghaas-Knobloch (ed.): Weltweit geltende Arbeitsstandards trotz Globalisierung. Analyse, Diagnosen und Einblicke. Bd. 18, Arbeitsgestaltung - Technikbewertung - Zukunft, Münster/ Berlin/ Hamburg/ London/ Wien: LIT Verlag, 157-178(2005 ). 

Sozialpartnerschaftliche Kooperation in der arbeitsrechtlichen Regulierung: ein europäischer Weg? In: Rainer Eising/Beate Kohler-Koch (eds.): Interessendurchsetzung im Mehrebenensystem. Baden-Baden: Nomos,  Bd. 53, 341-362, (2005), with Gerda Falkner, Simone Leiber, Oliver Treib.

Inkonsistent, inkonsequent, intransparent? Zur supranationalen Kontrolle der Umsetzung der EU-Sozialpolitik in den Mitgliedstaaten. In: Patricia Bauer/Helmut Voelzkow (eds.), Die Europäische Union – Marionette oder Regisseur? Wiesbaden: Verlag für Sozialwissenschaften, 125-152 (2004), with Gerda Falkner.

EG-Richtlinien als soziales Korrektiv im europäischen Mehrebenensystem? Eine Problemskizze und potentielle Wirkungsmuster. In: Adrienne Héritier/ Fritz W. Scharpf/ Michael Stolleis (eds.), European and International Regulation after the Nation State: Different Scopes and Multiple Levels, Baden-Baden: Nomos, 115-138 (2004), with Gerda Falkner, Simone Leiber, Oliver Treib.

In Search of the Worlds of Compliance: Promises and Pitfalls of Quantitative Testing,
Working Paper No. 113 in the IHS Political Science Series, IHS Vienna (2007), with Gerda Falkner, Simone Leiber, Oliver Treib.

The Implementation of EU Social Policy Directives in Belgium: Re-establishing equilibrium in domestic politics?
Paper presented at the International Seminar Europeanization of Social Policies/ Centre de recherches politiques de Sciences Po (CEVIPOF),
Paris & SPF (Federal Public Service Social Security), Bruxelles, 8 - 9 February 2007, Brussels.

Explaining Patterns of Expansive Usage of Delegated Power. The European Commission and Annulment Proceedings.
Paper to be presented at the 4th ECPR General Conference, Pisa, 6 - 8 September 2007, with Michael Bauer.

Problems of Operationalisation and Data in EU Compliance Research.
Paper to be presented at the 4th ECPR General Conference, Pisa, 6 - 8 September 2007, with Gerda Falkner.

EU Social Policy: The Governance Mix in Implementation Politics.
Discussion Paper 2007-04, Hugo Sinzheimer Institute, Amsterdam: University of Amsterdam (2007).

Über Politiklernen lernen. Überlegungen zur Europäischen Beschäftigungsstrategie,
Discussion Paper SP I 2006-114, Berlin: Social Science Research Center Berlin.

Europeanization of Policy and Politics: Changing the Social Dimension in Southern Europe?.
Paper presented at 15th International Conference of the Council for European Studies, Chicago, March 29 - April 2, 2006, with Simone Leiber.

Active Ageing and the European Social Model: Managing the transitions from work to retirement.
Paper presented at a conference of the Leopoldina-acatech working group "Opportunities and problems of an ageing society",
Monte Vertià/ Tessin, 26 - 28 January 2006, with Günther Schmid.

Variationen über ein Thema? Unterschiedliche Logiken in der Implementationspolitik von EU und IAO.
DVPW section-conference on International Relations 2005, Mannheim, 6 - 7 October 2005.

(Non-) Compliance, EU Commission Enforcement and Different National Responses.
EUSA Ninth Biennial International Conference, Austin, Texas, 31 March - 2 April 2005.

Democracy, Social Dialogue and Citizenship in the European Multi-level System.
Paper presented at the First Pan-European Conference on EU Politics, ECPR Standing Group on the European Union "The Politics of European Integration:
Academic Acquis and Future Challenges", Bordeaux, 26 - 28 September 2002, with Gerda Falkner, Simone Leiber, Oliver Treib.

Transforming Social Policy in Europe? The EC’s Parental Leave Directive and Misfit in the 15 Member States.
MPIfG Working Paper 02/11. Cologne: Max Planck Institute for the Study of Societies, 2002, with Gerda Falkner, Simone Leiber, Oliver Treib.

Book review "BRAUN, Dietmar, and GILARDI, Fabrizio (eds) (2006). Delegation in Contemporary Democracies. New York: Routledge, 256 pp. (Routledge / ECPR Studies in European Political Science)", Schweizerische Zeitschrift für Politikwissenschaft (2007) Vol. 13(2): 302-307.

Die 'neue' Einwanderung in die südlichen Mitgliedsländer der Europäischen Union. Eine arbeitsmarktbezogene Analyse am Beispiel Spaniens. Magisterarbeit, Universität Osnabrück (2000).

"Verspätet und inkorrekt. Wie wirkt die Sozialpolitik der Europäischen Union?", WZB-Mitteilungen 107, p. 34-36.

ILO and EU. Two mayor players in the transformation of national social policy: Working apart or together? ILO policy report (2004).