Skip to main content
Photo of Tom Delreux

Tom Delreux

Professeur

SSH/ESPO Faculty of Economic, Social and Political Sciences and Communication (ESPO)

SSH/ESPO/EURO Ecole interfacultaire en études européennes (EURO)

SSH/SPLE Institut de sciences politiques Louvain-Europe (ISPOLE)

2026
Book chapter

Delreux, Tom ; Crellin, Christopher. EU Climate Policy. In: Orsini A., Kavvatha E., EU Environmental Governance. Current and Future Challenges, Routledge: Abingdon, 2026, p. 36-53. 9781003479260. doi:10.4324/9781003479260-4.


2025
Journal article

Bardou, Marine ; Delreux, Tom. How the European Parliament Chooses Its Battles: Parliamentary Resolutions on the Negotiation of International Agreements. In: JCMS: Journal of Common Market Studies, Vol. 63, no.6, p. 1764-1782 (2025). doi:10.1111/jcms.13720.


2024
Journal article

Delreux, Tom ; Earsom, Joseph. Missed opportunities: The impact of internal compartmentalization on EU diplomacy across the international regime complex on climate change. In: Journal of European Public Policy, Vol. 31, no. 9, p. 2960-2985 (2024). doi:10.1080/13501763.2023.2217849.


Book chapter

Delreux, Tom. New institutionalism. In: Brandsma G., Handbook on European Union Public Administration, Edward Elgar: Cheltenham, 2024, p. 22-33. 9781802209006. doi:10.4337/9781802209013.


2023
Journal article

Earsom, Joseph ; Delreux, Tom. A New Kid in Town? The Evolution of the EEAS Headquarters’ Involvement in EU Climate Diplomacy. In: European Foreign Affairs Review, Vol. 28, no.3, p. 283-302 (2023).


Earsom, Joseph ; Delreux, Tom. One Big Conversation: The EU's Climate Diplomacy across the International Regime Complex on the Paris Agreement Negotiations. In: JCMS: Journal of Common Market Studies, Vol. 61, no. 1, p. 198-214 (2023). doi:10.1111/jcms.13365.


Delreux, Tom ; Earsom, Joseph. The European Union as an Actor Navigating International Regime Complexes. In: Politics and Governance, Vol. 11, no.2, p. 1-5 (2023). doi:10.17645/pag.v11i2.6901.


Monography

Keukeleire, Stephan ; Delreux, Tom. Η εξωτερική πολιτική της Ευρωπαϊκής Ένωσης, Pedio Books: Athens, 2023. 9789606357121. 544 p.


Book chapter

Biedenkopf, Katia ; Delreux, Tom. European Integration, the Environment and Climate Change. In: Segers, Mathieu, Van Hecke, Steven, The Cambridge History of the European Union, Cambridge University Press: Cambridge, 2023, p. 418-441. 9781108780865. doi:10.1017/9781108780865.017.


2022
Monography

Keukeleire S. ; Delreux, Tom. The Foreign Policy of the European Union. Third Edition, Third Edition, Bloomsbury: London, 2022. 9781350930483. 460 p.


2021
Journal article

Earsom, Joseph ; Delreux, Tom. A Nice Tailwind: The EU’s Goal Achievement at the IMO Initial Strategy. In: Politics and Governance, Vol. 9, no.3, p. 401-411 (2021). doi:10.17645/pag.v9i3.4296.


Delreux, Tom ; Pipart, Frauke. Ego versus Alter: Internal and External Perceptions of the EU’s Role in Global Environmental Negotiations. In: Journal of Common Market Studies, Vol. 59, no.5, p. 1284-1302 (2021). doi:10.1111/jcms.13182.


Earsom, Joseph ; Delreux, Tom. Evaluating EU responsiveness to the evolution of the international regime complex on climate change. In: International Environmental Agreements: Politics, Law and Economics, Vol. 21, no. 4, p. 711–728 (2021). doi:10.1007/s10784-021-09541-8.


Pipart, Frauke ; Delreux, Tom. Role Perceptions in Global Environmental Negotiations: From Reformist Leaders to Conservative Bystanders. In: The International Spectator, Vol. 56, no.3, p. 7-23 (2021). doi:10.1080/03932729.2021.1939971.


Laloux, Thomas ; Delreux, Tom. The origins of EU legislation: agenda-setting, intra-institutional decision-making or interinstitutional negotiations?. In: West European Politics, Vol. 44, no. 7, p. 1555-1576 (2021). doi:10.1080/01402382.2020.1836861.


Book chapter

Delreux, Tom. Regional governance. In: Morin J., Orsini A., Essential Concepts of Global Environmental Governance. Second edition, Routledge: Abingdon, 2021, p. 213-216. 9780367418694.


Delreux, Tom. The EU in international environmental negotiations. In: Jordan A., Gravey V., Environmental Policy in the EU. Actors, Institutions and Processes, Routledge: Abingdon, 2021, p. 259-275. 9781138392168.


2019
Journal article

Delreux, Tom ; Burns, Charlotte. Parliamentarizing a Politicized Policy: Understanding the Involvement of the European Parliament in UN Climate Negotiations. In: Politics and Governance, Vol. 7, no.3, p. 339-349 (2019). doi:10.17645/pag.v7i3.2093.


Book chapter

Delreux, Tom ; Pipart, Frauke. Climate Policy in European Union Politics. In: Laursen F., The Oxford Encyclopedia of European Union Politics, Oxford University Press: Oxford, 2019. 10.1093/acrefore/9780190228637.013.109. doi:10.1093/acrefore/9780190228637.013.109.


Delreux, Tom ; Adriaensen, Johan. Principal-Agent Analysis and the European Union. In: Laursen F., The Oxford Encyclopedia of European Union Politics, Oxford University Press: Oxford, 2019. 10.1093/acrefore/9780190228637.013.109. doi:10.1093/acrefore/9780190228637.013.1048.


2018
Journal article

Delreux, Tom ; Laloux, Thomas. Concluding Early Agreements in the EU: A Double Principal-Agent Analysis of Trilogue Negotiations. In: Journal of Common Market Studies, Vol. 56, no. 2, p. 300-317 (2018). doi:10.1111/jcms.12633.


Laloux, Thomas ; Delreux, Tom. How much do agents in trilogues deviate from their principals’ instructions? Introducing a deviation index. In: Journal of European Public Policy, Vol. 25, no. 7, p. 1067 (2018). doi:10.1080/13501763.2018.1428215.


Delreux, Tom ; Adriaensen, Johan. Twenty years of principal-agent research in EU politics: how to cope with complexity?. In: European Political Science, Vol. 17, no.2, p. 275 (2018). doi:10.1057/s41304-017-0129-4.


Book chapter

Pirlot, Pauline ; Delreux, Tom ; Farcy, Christine. Forests: A Multi-sectoral and Multi-level Approach to Sustainable Forest Management. In: Adelle, C., Biedenkopf, K., Torney, D., European Union External Environmental Policy. Rules, Regulation and Governance Beyond Borders. (The EU in International Affairs series), Palgrave Macmillan, 2018, p. 167-187. 978-3-319-60930-0. doi:10.1007/978-3-319-60931-7.


Delreux, Tom. Multilateral Environmental Agreements: A Key Instrument of Global Environmental Governance. In: Adelle C., Biedenkopf K., Torney D., European Union External Environmental Policy, Palgrave Macmillan: London, 2018, p. 19-38. 978-3-319-60930-0. doi:10.1007/978-3-319-60931-7_2.


2017
Journal article

Delreux, Tom ; Keukeleire, Stephan. Informal division of labour in EU foreign policy-making. In: Journal of European Public Policy, Vol. 24, no.10, p. 1471-1490 (2017). doi:10.1080/13501763.2016.1216151.


Monography

The Principal Agent Model and the European Union, éd. Delreux, Tom ; Adriaensen, Johan (Palgrave Studies in European Union Politics), Palgrave Macmillan: London, 2017. 978-3-319-55136-4. 304 p.


Keukeleire, Stephan ; Delreux, Tom. 欧盟外交政策 [EU foreign policy] (欧盟与世界丛书 [The European Union and the World Series]), 上海人民 [Shanghai People’s Publishing House]: Shanghai, 2017. 978-7-208-14439-2. 408 p.


Book chapter

Adriaensen, Johan ; Delreux, Tom. Conclusion. Opportunities and Challenges for the Principal–Agent Model in Studying the European Union. In: Delreux Tom & Adriaensen Johan, The Principal Agent Model and the European Union, Palgrave Macmillan: London, 2017, p. 283-299. 978-3-319-55136-4. doi:10.1007/978-3-319-55137-1_12.


Delreux, Tom ; Adriaensen, Johan. Introduction. Use and limitations of the principal-agent model in studying the European Union. In: Delreux Tom & Adriaensen Johan, The Principal Agent Model and the European Union, Palgrave Macmillan: London, 2017, p. 1-34. 978-3-319-55136-4. doi:10.1007/978-3-319-55137-1_1.


Delreux, Tom ; Pirlot, Pauline. The EU Performance in the UN Forum on Forests: An Analysis of the EU at UNFF11. In: Spyros Blavoukos, Dimitrios Bourantonis, The EU in UN Politics, Palgrave Macmillan: London, 2017, p. 187-207. 978-1-349-95151-2. doi:10.1057/978-1-349-95152-9_10.


2016
Monography

Delreux, Tom ; Happaerts, Sander. Environmental Policy and Politics in the European Union, Palgrave Macmillan: London, 2016. 9780230244269. 304 p.


2015
Journal article

Keukeleire, Stephan ; Delreux, Tom. Competing structural powers and challenges for the EU's structural foreign policy. In: Global Affairs, Vol. 1, no.1, p. 43-50 (2015). doi:10.1080/23340460.2015.983730.


Book chapter

Delreux, Tom ; Randour, François. Belgium: Institutional and Administrative Adaptation but Limited Political Interest. In: Hefftler C., Neuhold C., Rozenberg O., Smith J., The Palgrave Handbook of National Parliaments and the European Union, Palgrave Macmillan: Basingstoke, 2015, p. 153-169. 9781137289124. doi:10.1007/978-1-137-28913-1_7.


Delreux, Tom. Bureaucratic Politics, New Institutionalism and Principal-Agent Models. In: Jørgensen K., Aarstad A., Drieskens E., Laatikainen K., Tonra B., The SAGE Handbook on European Foreign Policy, SAGE: London, 2015, p. 152-165. 9781446276099. doi:10.4135/9781473915190.n10.


Delreux, Tom. Regional governance. In: Morin J.F., Orsini A., Essential Concepts of Global Environmental Governance, Routledge: Abingdon, 2015, p. 172-175. 978-0-415-82246-6.


2014
Journal article

Delreux, Tom. EU actorness, cohesiveness and effectiveness in environmental affairs. In: Journal of European Public Policy, Vol. 21, no.7, p. 1017-1032 (2014). doi:10.1080/13501763.2014.912250.


Randour, François ; Janssens, Cédric ; Delreux, Tom. The Cultivation of Genetically Modified Organisms in the European Union: A Necessary Trade-Off?. In: Journal of Common Market Studies, Vol. 52, no.6, p. 1307-1323 (2014). doi:10.1111/jcms.12149.


Monography

Keukeleire, Stephan ; Delreux, Tom. The Foreign Policy of the European Union (2nd edition), 2nd edition, Palgrave Macmillan: Basingstoke, 2014. 9781137025746. 390 p.


Book chapter

Delreux, Tom. The EU and multilateralism in the environmental field. UNEP reform and external representation in environmental negotiations. In: Drieskens E., van Schaik L., The EU and Effective Multilateralism. Internal and external reform practices, Routledge: Abingdon, 2014, p. 66-83. 978-0-415-71311-5.


2013
Journal article

Delreux, Tom ; Randour, François. L'européanisation des institutions belges: l'adaptation du parlement fédéral belge au processus décisionnel européen. In: Revue des affaires européennes, Vol. 19, no.1, p. 55-65 (2013).


Delreux, Tom ; Van den Brande, Karoline. Taking the lead: informal division of labour in the EU's external environmental policy-making. In: Journal of European Public Policy, Vol. 20, no.1, p. 113-131 (2013). doi:10.1080/13501763.2012.693421.


2012
Journal article

Delreux, Tom. Book review. Cooperation or Conflict? Problematizing Organizational Overlap in Europe. In: West European Politics, Vol. 32, no. 2, p. 428-429 (2012). doi:10.1080/01402382.2011.648476.


Delreux, Tom. The Rotating Presidency and the EU’s External Representation in Environmental Affairs: the Case of Climate Change and Biodiversity Negotiations. In: Journal of Contemporary European Research, Vol. 8, no.2, p. 210-227 (2012).


Book chapter

Delreux, Tom ; Criekemans, David. Environment, Climate Change and Energy: Inter-institutional Compromises and International Representation. In: Van Hecke S., Bursens P., Readjusting the Council Presidency. Belgian Leadership in the EU, Academic & Scientific Publishers: Brussels, 2012. 978-90-5487-852-0.


Delreux, Tom. The EU as an actor in global environmental politics. In: Jordan A., Adelle C., Environmental Policy in the EU. Actors, institutions and processes. Third edition, Routledge: London & New York, 2012, p. 287-305. 9781849714693. doi:10.4324/9780203109823.


Delreux, Tom. The EU in Negotiations on the Cartagena Protocol on Biosafety. In: Wouters Jan, Bruyninckx Hans, Basu Sudeshna, Schunz Simon (eds.), The European Union and Multilateral Governance. Assessing EU Participation in United Nations Human Rights and Environmental Fora, Palgrave Macmillan: Basingstoke, 2012, p. 214-231. 978-0-230-28231-5.


Delreux, Tom ; Drieskens, Edith ; Kerremans, Bart ; Damro, Chad. The External Context Matters: The EU in International Negotiations. In: Costa O., Jørgensen K., The Influence of International Institutions on the EU. When Multilateralism hits Brussels, Palgrave Macmillan: Basingstoke, 2012, p. 58-75. 978-0-230-31448-1.


Justaert, Arnout ; Drieskens, Edith ; Van den Brande, Karoline ; Delreux, Tom. The Governance Turns in EU Studies in Belgium. In: Bindi F., Eliassen K., Analyzing European Union Politics, Società edidrice il Mulino: Bologna, 2012, p. 93-114. 978-88-15-14716-5.


2011
Journal article

Delreux, Tom. Book review. Integrating Europe: Informal politics & institutional cchange. In: Acta Politica : international journal of political science, Vol. 46, no. 4, p. 425-427 (2011). doi:10.1057/ap.2011.23.


De Ville, Ferdi ; Criekemans, David ; Delreux, Tom. De verrassend effectieve interne coördinatie van het Belgisch Voorzitterschap van 2010: algemene analyse en toepassing op de casus Milieubeleid. In: Res Publica : Belgian journal of political science, Vol. 53, no. 3, p. 291-313 (2011).


Delreux, Tom. EU-besluitvorming en internationale milieuonderhandelingen. In: Bestuurskunde, Vol. 20, no. 4, p. 62-72 (2011).


Delreux, Tom. La politique environnementale et climatique : le rôle interne et externe de la Présidence belge. In: Annales d'études européennes, Vol. 9, no. —, p. 55-70 (2011).


Delreux, Tom. The relation between the European Commission and the EU member states in the transatlantic Open Skies negotiations: an analysis of their opportunities and constraints. In: Journal of Transatlantic Studies, Vol. 9, no. 2, p. 113-135 (2011). doi:10.1080/14794012.2011.568164.


Monography

Delreux, Tom. The EU as International Environmental Negotiator, Ashgate: Surrey, 2011. 978-1-4094-1182-6. 245 p.


2010
Journal article

Delreux, Tom ; Kerremans, Bart. How agents weaken their principals’ incentives to control: the case of EU negotiators and EU member states in multilateral negotiations. In: Journal of European Integration, Vol. 32, no. 4, p. 357-374 (2010). doi:10.1080/07036331003797554.


Book chapter

Delreux, Tom. The First Stage EU-US Open Skies Negotiations (2003-2007): A Look at the Internal Decision-Making Process in the European Union. In: Wouters J., Sterckx S., European Union, United States and Global Governance. Major Trends and Challenges. (Belgium) Leuven, 2010, p. 111-126.


2009
Journal article

Delreux, Tom. Cooperation and control in the European Union. The case of the EU as international environmental negotiator. In: Cooperation and Conflict, Vol. 44, no. 2, p. 189- 208. (2009). doi:10.1177/0010836709102739.


Delreux, Tom. The EU in Environmental Negotiations in UNECE: An Analysis of its Role in the Aarhus Convention and the SEA Protocol Negotiations. In: Review of European Community and International Environmental Law, Vol. 18, no. 3, p. 329-337 (2009). doi:10.1111/j.1467-9388.2009.00653.x.


Delreux, Tom. The EU negotiates multilateral environmental agreements: explaining the agent’s discretion. In: Journal of European Public Policy, Vol. 16, no. 5, p. 719-737 (2009). doi:10.1080/13501760902983432.


Delreux, Tom. The European Union in International Environmental Negotiations: an Analysis of the Stockholm Convention Negotiations. In: Environmental Policy and Governance, Vol. 19, no. 1, p. 21-31 (2009). doi:10.1002/eet.494.


2008
Journal article

Delreux, Tom. De Europese Unie in internationale milieuonderhandelingen: wat verklaart de onderhandelingsautonomie van de EU-onderhandelaar?. In: Res Publica : Belgian journal of political science, Vol. 50, no. 2, p. 99-122 (2008).


Delreux, Tom. The EU as a negotiator in multilateral chemicals negotiations: multiple principals, different agents. In: Journal of European Public Policy, Vol. 15, no. 7, p. 1069-1086 (2008). doi:10.1080/13501760802311858.


2006
Journal article

Delreux, Tom. Nog steeds de beste leerling van de klas? België en het Europees constitutionaliseringsproces. In: Internationale Spectator : maandblad voor internationale politiek, Vol. 60, no. 6, p. 326-331 (2006).


Delreux, Tom. The European Union in international environmental negotiations: a legal perspective on the internal decision-making process. In: International Environmental Agreements: Politics, Law and Economics, Vol. 6, no. 3, p. 231-248 (2006). doi:10.1007/s10784-006-9015-1.


2005
Journal article

Delreux, Tom. Twee sporen en vier niveaus: het Europees beleid van België ten aanzien van de Europese landbouwhervormingen van 1992 en 2003. In: Res Publica : Belgian journal of political science, Vol. 47, no. 4, p. 466-493 (2005).


Book chapter

Delreux, Tom ; Steensels, Caroline. Belgium. In: Lodge J., The 2004 Elections to the European Parliament, Palgrave Macmillan: New York, 2005, p. 65-72. 978-1-4039-3517-5.


2004
Journal article

Beyers, Jan ; Delreux, Tom ; Steensels, Caroline. The Europeanisation of Intergovernmental Cooperation and Conflict Resolution In Belgium: The Case of Agriculture. In: Perspectives on European Politics and Society : journal of intra-european dialogue, Vol. 5, no. 1, p. 103-134 (2004). doi:10.1080/15705850408438881.


Learning units for 2025

Label Code
L'Union européenne dans le monde BEUSL2721
Political Theories of European integration LEUSL2010
External Action of the European Union LEUSL2012
Actors of the European political system LEUSL2015
Europeanisation LEUSL2016
Year Label School
2008 Doctorat en sciences sociales Katholieke Universiteit Leuven (Belgique)
2003 Katholieke Universiteit Leuven (Belgique)