CiRclash Project
This project focuses solving clashes between circular and legal principles in public procurement

Project title
Governmental Trendsetters: Solving Clashes between Circular and Legal Principles (CIRCLASH)

Funding
Netherlands Research Council (NWO) as part of the National Science Agenda (NWA)

Project period
November 2025 – July 2027
Research Question 1
How do legal principles (equality, transparency, and proportionality) clash with circular principles (re-use, recycle, repair etc.) in circular public procurement?
Research Question 2
How can these clashes be resolved in legislation, procurement criteria and contracts?
About the Project
Rethinking how we use materials is essential for a sustainable future. Yet despite growing urgency around climate change and resource scarcity, the shift from a linear to a circular economy remains slow. Public procurement, worth around €100 billion annually in the Netherlands and accounting for 14–19% of EU GDP, offers a powerful lever for change. By using their purchasing power, governments can reshape markets and accelerate circular production.
Circular procurement allows public authorities to meet societal needs while promoting circular principles such as reducing, reusing, repairing, and recovering materials. But in practice, it is still rare. One potential major barrier is the legal framework that governs public purchasing. Designed primarily to create an internal market, not circularity, it often clashes with circular ambitions. Although the 2014 EU Directives regulating public procurement allow for criteria beyond price, most public contracts are still awarded on price alone. Fragmented rules with more than 60 pieces of EU legislation regulating public procurement besides the 2014 Directives, limited awareness, and legal uncertainties further seem to discourage both authorities and market parties from embracing circular approaches.
CIRCLASH tackles this challenge. The project investigates where circular principles conflict with principles of public procurement law and develops solutions to bridge these gaps. With EU public procurement legislation currently under review, CIRCLASH will provide timely recommendations for legal reform as well as practical tools, such as circular criteria and model clauses, to help practitioners confidently procure for a circular future. The research design involves important stakeholders from the very beginning of the project to maximize impact in practice.
Involved stakeholders: Province of Utrecht, Municipality of Utrecht, Kenniskring Aanbesteden, UMC Utrecht, Bureau Inkoop Zuid-Oost Brabant (Bizob)
Deliverables
Published and submitted peer-reviewed articles in journals:
- Forthcoming
Monographs and contributions to books
Other communication in public media
Presentations held at symposiums, conferences etc.
Research Stays
Researchers

prof. dr. Willem Janssen
Endowed Professor
Willem Janssen
prof. dr. W.A. (Willem) Janssen is the principle investigator of the CIRCLASH project. He is the Endowed Professor of Public Procurement Law, holding the chair of the Dutch Association for Public Procurement Law, and an Associate Professor of European and Dutch Public Procurement Law. He holds these positions respectively at the Faculty of Law, Groningen University and at the law department of Utrecht University. He is a researcher at the Centre for Public Procurement (UUCePP) and the Centre for Regulation and Enforcement in Europe (RENFORCE).

dr. Esra Akdogan
Post-Doctoral Fellow
Esra Akdogan
After completing her Bachelor of Law at Ankara University as an honor student, Dr. Akdogan worked in a top law office in Ankara, the Bar Association of which she is registered as a qualified lawyer. She also studied at Ludwig-Maximilians-Universität München for a year.
Dr. Akdogan graduated from Advanced LLM in the European and International Business Law programme of Leiden University with cum laude distinction. She pursued her studies as a Jean Monnet scholar, funded by the European Union. During her masters, Dr. Akdogan participated in the European Law Moot Court competition as well as being a member of Honours Academy of Leiden University.
She conducted her PhD research at the University of Groningen in the areas of EU external relations and sustainable development, with her thesis titled Decrypting sustainability in EU Free Trade: Substantive content and the enforceability of the Trade and Sustainable Development chapters. She worked as a lecturer and researcher at the Law Group of Wageningen University and Research (WUR), in the Netherlands. Her research areas focus on EU law and sustainability, the trade and sustainability nexus, and international economic law. She is experienced in teaching EU law and is a member of ICON-S Benelux, the Global Network for Human Rights and the Environment and Netherlands Network for Human Rights Research.
She currently is a post-doc researcher at Utrecht University and conducts research under the NWO-funded research project, CIRCLASH, aiming to solve clashes between circular and legal principles in public procurement.


