Online Choice Architecture


Panel event, London and Zoom, 26 May 2022


Author: Vedran Lesci

The Competition and Markets Authority is hosting a panel event to discuss the relevance of Online Choice Architecture (OCA) to competition and consumer issues. The panel event will kick off a keynote by Prof. Cass Sunstein (virtual) followed by two hybrid panels with notable global experts who will further discuss why and how we should address harmful OCA practices.

We would be delighted if you could join us virtually or in-person on 26 May, 4-6pm, London time. Please click below

to register, and for more information.


4:00-4:10 Introduction by Stefan Hunt (Chief Data and Technology Insight Officer, CMA)

4:10-4:30 Keynote (virtual) by Prof. Cass Sunstein (Robert Walmsley University Professor at Harvard Law School and co-author of “Nudge”)

4:30-5.15 Panel 1 (hybrid) – Why OCA matters for consumers and businesses?

Chair: George Lusty (Senior Director for Consumer Protection at the Competition and Markets Authority)


  • Rocio Concha (Director of Policy and Advocacy & Chief Economist, Which?)
  • Prof. Eric Johnson (Professor of Business and Marketing, Columbia Business School, author of “The Elements of Choice”)
  • Prof. Lior Strahilevitz (Professor of Law, Uni. of Chicago, and author on dark patterns)

5:15-6:00 Panel 2 (hybrid)– What should we do about poor and manipulative OCA?

– Chair: Angelique Bret (Competition Lawyer and partner at Pinsent Masons)


  • Prof. Lucia Reisch (El-Erian Professor of Behavioural Economics and Policy, Uni. of Cambridge)
  • Prof. Lauren Willis (Associate dean for research and professor of Law at Loyola Law School)
  • Dr. Esra Oskan (UX Insights, Strategy and Design Lead at Google Choice Lab/ Alphabet Inc)

Recently, the CMA’s Behavioural Hub published two reports on OCA

a discussion paper on how digital design can potentially harm consumers and competition, and an evidence review of potentially harmful OCA practices used by businesses.

This panel event is part of CMA’s wider program of work focusing on understanding how digital design can influence consumers’ decisions and behaviour in online environments. The program aims to bolster existing research and learn from past cases focusing on gaps in our knowledge about the scale, prevalence and harm of certain design practices.

Please see registration page for more information on the event.

This event will be of interest to the global competition and consumer community, and anyone – whether in the public sector, industry, or academia – interested in the use of behavioural science, data, technology and analytics to understand and take action in digital markets.

Sign up now

to attend virtually or register your interest for in-person attendance (limited availability).

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