Centre for Law, Economics and Society (CLES)


The CLES is currently planning the following events:

More Than Money: The Economics of Payments and Its Regulation
Speaker: Professor David Evans, University College London
11 March 2015

For more information, please go to the events pages.


Contact Us

For general enquiries, please contact:

Tatjana Wingender
+44 (0)20 7679 1407
t.wingender [at] ucl.ac.uk

For research project enquiries, please contact:

Dr Ioannis Lianos
+44 (0)20 7679 1028
i.lianos [at] ucl.ac.uk .


For more working papers, please visit the CLES Research Paper Series section on this website.

Deni Mantzari

F Deni Mantzari

LL.B. (2007), National University of Athens; LL.M European Union Law (2008), UCL; PhD (2014);  Qualified Advocate (Athens)

Co-ordinator of the e-Competitions

Email: d.mantzari@ucl.ac.uk

Despoina (Deni) Mantzari is a Lecturer in Law at the University of Reading School of Law and a Teaching Fellow at UCL. She holds a PhD from UCL (AHRC doctoral scholarship), an LL.M in European Union Law (distinction) from UCL and a law degree from the National University of Athens (merit).

Deni's PhD thesis explored the transformation of judicial review in the context of appeals from utilities regulators in the US and the UK, following the regulators' greater recourse to expert economic evidence and analysis. It examined the judicial scrutiny of economic evidence in both generalist courts (i.e. UK High Court, US Federal Courts) and in specialist courts (i.e. UK Competition Appeal Tribunal) and revealed a set of micro-level (e.g. standard of review, court's rules of procedure) and macro-level (e.g. cultural and socio-political factors) factors that determine the reception of economic evidence in courts.

In 2013-2014 Deni was a Postdoctoral Research Fellow at the ESRC Centre for Competition Policy at the University of East Anglia. In 2010 she was awarded an AHRC Study Visit Fund and spent a semester as a Visiting Researcher at UC Berkeley Boalt Hall School of Law. She has also attended a number of JD Courses as well as law courses at Université de Reims-Champagne- Ardenne in France (Erasmus Programme).

Deni has worked as a trainee lawyer and qualified to practice law in Greece (Athens Bar Association). She has also been invited in the judicial training programme of the European Commission (2013).

Research Interests

Deni’s main research interests lie in regulated industries law, on all aspects of EU and US public law, EU Competition law, US Antitrust, Law and Economics and Pharmaceutical Regulation. 


  • The Impact of Economic Evidence and Analysis on the Regulator's Discretionary Power: Focus on Utilities Regulation in the US and the UK', 5th Biennial ECPR Standing Group for Regulatory Governance Conference, 25-27 June, Barcelona, Spain
  • 'Has the Increased Recourse to Expert Economic Evidence and Analysis Transformed Administrative Discretion? Evidence from the UK Utilities Regulation', 8th Competition Law and Economics European Network (CLEEN), 10-11 June 2014, Norwich, UK
  • 'The Implications of Economic Evidence for the Court-Agency Relationship in the Realm of Utilities Regulation in the US and the UK', CCP Research Seminar, 30 January 2014, Norwich, UK
  • 'Towards a Complementary Relationship? The Judge and the Agency in the Realm of Economic Regulation', 4th Biennial ECPR Standing Group for Regulatory Governance Conference, 27-29 June 2012, Exeter, UK
  • ‘Pharmaceutical Parallel Trade in EU Courts. What Room for Economic Evidence?’, SMI’s 5th Annual Conference for Pharmaceutical Parallel Trade, 7-8 February 2011, London, UK (invited speaker)
  • ‘Impact of the GSK Cases on Parallel Imports for Pharmaceuticals in Europe’, SMI’s 4th Annual Conference on Pharmaceutical Parallel Trade, 10-11 February 2010, London, UK (invited speaker)


  • Mantzari, D., 2014, The Process of Regulatory Appeals in the UK: One Size Does Not Fit All. Centre for Competition Policy Research Bulletin Issue 27. Available online at: http://competitionpolicy.ac.uk/news/ccp-research-bulletin
  • Hviid, M., Mantzari, D., and Waddams, C., May 2014, Response to Ofgem: Consultation on a Proposal to Make a Market Investigation Reference in Respect of the Supply and Acquisition of Energy in Great Britain. Centre for Competition Policy Responses to Consultations. Available online at: http://competitionpolicy.ac.uk/publications/responses-to-consultations
  • Mantzari, D. and Tapia, J., 2013. The Regulation/Competition Interaction. In: Lianos, I. and Geradin, D. eds. Research Handbook in Competition Law,Edward-Elgar, Ch.15. Available online at:http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2044722. (Article was listed on SSRN's Top Ten download list for Industrial Organisation & Regulation Journals)
  • Mantzari, D. and Korah, V., 2012. It Takes One to Tango. The Single UK Competition and Markets Authority. Antitrust Chronicle, Competition Policy International, 5(1). Available online at:https://www.competitionpolicyinternational.com/it-takes-one-to-tango-the-single-u-k-competition-and-markets-authority/
  • Mantzari, D., 2011, The EC and CJEU Approach to Pharmaceutical Parallel Trade. Parallel Trade: The Challenges Ahead, Pharma Pricing and Reimbursement, IMS Health, 16(4), 109.
  • Mantzari, D., 2009, Case T-196/04 Ryanair v Commission: a Critical Comment. Newsletter of Administrative Law 49(1). (in Greek)

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