Adrian Majumdar

Adrian Majumdar is the Managing Partner at RBB Economics. He has 30 years’ experience assessing competition matters and was formerly the Acting Chief Economist at the Office of Fair Trading (OFT), a predecessor of the UK Competition and Markets Authority.

Adrian is referenced in Who’s Who as “an undisputable leader in the field” and “one of the absolute best” when it comes to complex investigations work. He was the Who’s Who “Competition Economist of the Year” in both 2021 and 2022.

Working on competition matters since 1995, Adrian has a wealth of experience covering horizontal and non-horizontal mergers, litigation matters, abuse cases, vertical agreements, cartels, market investigations, regulation, and compliance advice.

Adrian has provided expert testimony for many clients and has been cross examined and participated in ‘hot tubs’ before the UK Competition Appeal Tribunal, the International Dispute Resolution Centre, and other courts.

Adrian has also advised on some of the leading competition law cases in Europe, including Intel (for AMD) and Post Danmark II, as well as numerous high profile Phase II mergers before the European Commission and national competition authorities around the world, notably the UK.

Adrian has published on nearly all aspects of competition economics, including co-authoring the textbook UK Merger Control, and reports for competition authorities on cost-pass through, selective price cuts and fidelity rebates, buying groups, savings from competition policy, and modern models of collusion. He has also published on innovation, FRAND, and digital markets.

While at the OFT, Adrian was the principal author of the Competition Act guidelines on Market Definition and the Assessment of Market Power.

Adrian is a co-founder of the King’s College London Postgraduate Diploma in Economics for Competition Law, attended by staff from several competition authorities and other practitioners. He is also on the Advisory Board of the British Institute of International and Comparative Law (BIICL) Competition Law Forum, as well as a non-governmental advisor for the UK to the International Competition Network. Adrian has acted as an expert for the OECD on competition matters.

Adrian’s regulatory experience includes time at the Civil Aviation Authority, where he was involved in the setting of price caps and devising appropriate investment incentives for regulated airports. He has also advised on promoting competition in the telecoms sector.

Adrian completed his undergraduate studies at Cambridge University and his PhD at the Centre for Competition Policy at the University of East Anglia.