Unité mixte de recherche 7235

Law and Economic Policy International Workshop : Antitrust for platform and network markets

Law and Economic Policy International Workshop :
Antitrust for platform and network markets

11-12 December 2014
Campus Université Paris Ouest Nanterre La Défense
G building, 6th floor, room 614
click here for campus map

Over the past decade two-sided and network markets have been the object of substantial research. One important result of the economic literature dealing with firms’ behavior on such markets is that, due to the necessity to balance the interests of two different types of customers, related by cross-group externalities, it is often possible to see firms adopt strategies that would be sub-optimal otherwise. For instance, it is possible, even for monopolies, to consistently set the price below the marginal cost on one side of the platform in order to increase revenue on the other. Nevertheless, the antitrust implications of such private strategies have not been fully explored, and recent decisions by competition agencies such as the European Commission or the US DoJ (the Google case or the Deutche Borse/ NYSE-Euronext merger) indicate that substantial progress is still needed in the field of optimal public policy response to firms’ strategies on such markets.

This workshop will address the issue of competition policy for platform and network markets. Invited practitioners and academics will debate during a panel discussion, a keynote address and two sessions (one dedicated to theory, another to empirics) to provide insight into the economic analysis and competition law implications of such markets. Questions such as the following will be tackled:

  • Can the usual tools for traditional/one-sided market definition be employed? Is there need to use different tools, or adapt existing ones?
  • In what respect is a two-sided or network market analysis important for the competitive assessment?
  • How is market power to be correctly assessed on such markets?
  • Should competition policy be different for such markets?
  • What was the impact of two-sidedness or network effects for recent decisions of the Commission/National competition authorities?

How to reach the Nanterre campus

The line A of the RER Paris train will take you directly to our campus. Our station is called Nanterre Université. Click here for the campus map. You can find more details about the Paris public transportation network at http://www.ratp.fr/en/.


  • Andrea Cosnita (EconomiX-CNRS & Univ. Paris West Nanterre La Défense)
  • Edmond Baranes (LAMETA-CNRS and Labex Entreprendre, Univ. Montpellier 1)

Scientific committee

  • Edmond Baranes (LAMETA-CNRS and Labex Entreprendre, Univ. Montpellier 1)
  • Andreea Cosnita (EconomiX-CNRS & Univ. Paris West Nanterre La Défense)
  • Eric Langlais (EconomiX-CNRS & Univ. Paris West Nanterre La Défense)
  • Jacques Pelletan (LED & Univ. Paris 8)
Registration (until Nov 15) is mandatory to attend the workshop. Registration is now closed.


click HERE

Thursday – December 11, 2014

14h00 – registration and coffee

14h15 – opening remarks

14h30 – panel discussion:
Anne Perrot (MAPP Economics and University of Paris I)
Nicolas Petit (Institute for European Legal Studies, Liege School of Law & Global Competition Law Centre, College of Europe)
Etienne Pfister (Chief economist with the French Competition Authority)-TBC
Florian Wagner-von Papp (UCL Laws and UCL Institute of Global Law & UCL Centre for Law and Economics)

16h15 – coffee break

16h45 – keynote address:
Lars Sørgard (Norwegian School of Economics and Business Administration and Bergen Center for Competition Law and Economics)
Antitrust in two-sided markets

Friday – December 12, 2014

8h45 – coffee

9h – Morning session: Theory (I)
Markus Reisinger (WHU – Otto Beisheim School of Management)
Either or Both Competition: A « Two-Sided » Theory of Advertising with Overlapping Viewerships (joint with Attila Ambrus and Emilio Calvano)
Thomas Cortade (BETA-CNRS and University of Lorraine)
Merger control on two-sided markets: is there need for an efficiency defense? (joint with Edmond Baranes and Andreea Cosnita-Langlais)

10h30 – coffee break

11h – Morning session: Theory (II)
Bjørn Olav Johansen (University of Bergen and Bergen Center for Competition Law and Economics)
Resale price maintenance in two-sided markets (joint with Tommy S. Gabrielsen and Teis L. Lømo)
Germain Gaudin (Düsseldorf Institute for Competition Economics)
On the Antitrust Economics of the Electronic Books Industry (joint with Alexander White)

12h30 – lunch break

14h – Afternoon session: Empirics (I)
Lapo Filistrucchi (University of Florence and Tilburg University, CenTER and TILEC)
Banning Ads from Prime-Time State TV: Lessons from France (joint with Luigi Luini and Andrea Mangani)
Marc Ivaldi (Toulouse School of Economics)
Airport Price in a two-sided market setting: major US airport (joint with Senay Sokullu et Tuba Toru)

15h30 – coffee break

16h – Afternoon session: Empirics (II)
Stefan Behringer (Mercator School of Management, University Duisburg-Essen)
Price Wars in Two-Sided Markets: The case of the UK Quality Newspaper Industry (joint with Lapo Filistruchhi)
Antoine Chapsal (MAPP Economics)
Exclusive contracts and two-sided market dynamics

17h30 – end of workshop and concluding remarks


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