O.E. Widerberg MSc

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+31 20 59 82567
faculteit der bètawetenschappen ( dep. environmental policy analysis )
Researcher and PhD Candidate


Oscar Widerberg is a researcher and PhD candidate at the Institute for Environmental Studies (IVM). He works on fragmentation in global environmental governance, primarily on climate change, as a core member of the CONNECT-project (www.fragmentation.eu). Oscar is particularly interested in the connections between state and non-state actors, examining institutional complexity and fragmentation using network analysis, and how to improve the performance of global environmental governance.

Oscar is a fellow to the Earth System Governance project, a member of the Swedish think tank FORES Reference Group on International Climate Policy, and member of INOGOV’s Early Career Investigators’ Network (ECIN). He has published academic articles, policy reports, debate articles and book chapters on a variety of global environmental issues. He regularly participates in the public debate on environment, climate and energy, among other, through radio appearances, UNFCCC side-events, and open lectures.

Before joining IVM, Oscar worked in international consulting firms Trinomics and Ecorys, advising international public authorities, primarily European institutions, on environmental, energy and climate policies. He also carried out traineeships at the European Commission’s delegation to the United Nations in New York; the United Nation DESA’s Division on Sustainable Development in New York; and, the European Climate Foundation in the Hague.

Oscar holds a MSc in Environmental Science from Utrecht University and a BSc in International Relations from Malmö University. He is a Swedish native, speaks English and Dutch, and has a working knowledge of Danish, Norwegian and, to a lesser extent, French.


My research focuses on changing structure and agency in global environmental governance (GEG). The goal is to understand the causes, state, effects and management options for fragmentation in GEG. Fragmentation implies that international politics has changed fundamentally with the proliferation of actors and agreements governing different issue areas such as climate change and biodiversity, and create governance overlaps and gaps. In my research, I strive to combine quantitative (social) network approaches (SNA) and statistics with qualitative analysis from political science, international relations and sociology. The project zooms in on climate change, biodiversity and ocean governance. 

Academic training

2013 – datePhD Candidate at the Environmental Policy Analysis group at IVM
2007 – 2009MSc in Environmental Science, Utrecht University, NL 
2003 – 2006BSsc in International Relations, Malmö University, Sweden

Professional employment history

2012 – 2013Consultant, Triple E Consulting, Rotterdam, NL
2010 – 2012Consultant, Ecorys - Research and Consulting, Rotterdam, NL
2010Intern, European Climate Foundation, the Hague, NL
2009Researcher, Utrecht University, NL
2008Intern, United Nations (DESA) – Division for Sustainable Development, New York City, USA
2007Intern, European Commission’s Delegation to the United Nations, New York City, USA


Nominated for the Rachel Carson Milieuscriptieprijs from the Dutch network of environmental professionals (VVM), 2009

5 Key Publications

Chan, S., van Asselt, H., Hale, T., Abbott, K., Beisheim, M., Hoffmann, M., Guy, B., Höhne, N., Hsu, A., Pattberg, P., Pauw, P., Ramstein, C. & Widerberg, O. (forthcoming). Reinvigorating International Climate Policy: A Comprehensive Framework for Effective Non-state Action. Global Policy.

Widerberg, O. & Pattberg, P. (2015) International Cooperative Initiatives in global climate governance: Raising the ambition level or delegitimizing the UNFCCC? Global Policy,6(1), 45–56.

Widerberg, O. & P. Pattberg (2015) Companies in Cooperative Initiatives: Harnessing non-state climate action beyond Paris. FORES report 2015: 6.

Pattberg, P. & O. Widerberg (2015) The future of multi-stakeholder partnerships for sustainable development: Conditions for success. AMBIO, DOI: 10.1007/s13280-015-0684-2

Pattberg, P. & Widerberg, O. (2015) Theorising Global Environmental Governance: Key Findings and Future Questions. Millennium, 43(2), 684–705.