Yassine Lefouili

Updated September 2025

I am a Professor of Economics at the Toulouse School of Economics and the Managing Director of the Jean-Jacques Laffont - TSE Foundation.  I also serve as Vice-president of the Board of Directors of TSE Grand Etablissement. You can find a copy of my CV here and information about my research and teaching below.

Main research fields

Industrial Organization, Competition Policy, Digital Economics, Economics of Innovation and Intellectual Property,  Law and Economics.

Academic publications

Horizontal Mergers and Incremental Innovation (with Marc Bourreau and Bruno Jullien), RAND Journal of Economics, forthcoming. [Paper]. Previously circulated under the title "Mergers and Demand-Enhancing Innovation".

Privacy Regulation and Quality-Enhancing Innovation (with Leonardo Madio and Ying Lei Toh), The Journal of Industrial Economics, vol. 72 (2024), 662-684.

Do Standard-Essential Patent Owners Behave Opportunistically? Evidence from U.S. District Court Dockets (with Christian Helmers and Brian Love), American Law and Economics Review, vol. 25 (2023), 300-337.

The Economics of Platform Liability (with Leonardo Madio), European Journal of Law and Economics, vol. 53 (2022), 319-351.

Pooled Procurement of Drugs in Low and Middle Income Countries (with Pierre Dubois and Stéphane Straub), European Economic Review, vol. 132 (2021), 103655.

The Effect of Fee Shifting on Litigation: Evidence from a Policy Innovation in Intermediate Cost Shifting (with Christian Helmers, Brian Love and Luke McDonagh), American Law and Economics Review, vol. 23 (2021), 56–99.

Collusion Between Two-Sided Platforms (with Joana Pinho), International Journal of Industrial Organization, vol. 72 (2020), 102656.

Mergers in Two-Sided Markets: Insights from Cournot Competition (with Joao Correia-da-Silva, Bruno Jullien and Joana Pinho), Journal of Economics and Management Strategy, vol. 28 (2019), 109-124.

Chocs de Demande, Effets d'Apprentissage et Exclusion (with Catherine Bobtcheff and Claude Crampes), Revue Economique,  vol. 7 (2019), 168-181.

Cross-Licensing and Competition (with Doh-Shin Jeon), RAND Journal of Economics, vol. 49 (2018), 656-671.

Horizontal Mergers and Innovation (with Bruno Jullien), Journal of Competition Law and Economics, vol. 64 (2018), 364-392.

Who Needs a Copyright Small Claims Court? Evidence from the UK's Enterprise Court (with Christian Helmers, Brian Love and Luke McDonagh), Berkeley Technology Law Journal Commentaries (2018).

Tying in Two-Sided Markets with Multi-Homing: Corrigendum and Comment (with Jay Pil Choi and Bruno Jullien), The Journal of Industrial Economics, vol. 65 (2017), 872-886.

Entry and Merger Policy (with Laure Jaunaux and Wilfried Sand-Zantman), Economics Letters, vol. 161 (2017), 124-129.

Firm Location and Monopolistic Competition (with Takanori Ago and Hamid Hamoudi), Papers in Regional Science, vol. 96 (2017), 96, 211-220.

Invalid but Infringed? An Analysis of the Bifurcated Patent Litigation System (with Katrin Cremers, Fabian Gaessler, Dietmar Harhoff and Christian Helmers), Journal of Economic Behavior and Organization, vol. 131 (2016), 218-242.

Does Competition Spur Innovation? The Case of Yardstick Competition, Economics Letters, vol. 137 (2015), 135-139.

Optimal Licensing of Uncertain Patents in the Shadow of Litigation (with Rabah Amir and David Encaoua), Games and Economic Behavior, vol. 88 (2014), 320-338.

Leniency Programs for Multimarket Firms: The Effect of Amnesty Plus on Cartel Formation (with Catherine Roux), International Journal of Industrial Organization, vol. 30 (2012), 624-640.

Licensing "Weak" Patents (with David Encaoua), The Journal of Industrial Economics, vol. 57 (2009), 492-525.

Choosing Intellectual Protection: Imitation, Patent Strength and Licensing (with David Encaoua), Annals of Economics and Statistics, vol. 79-80, 241-271. Reprinted in the NBER book Contributions in memory of Zvi Griliches (2010), Eds Manuel Tratjenberg and Jacques Mairesse.

Working papers

Platform Liability and Innovation (with Doh-Shin Jeon and Leonardo Madio), R&R International Economic Review

Mergers between Suppliers under Buyer Power (with Matias Pietola), R&R RAND Journal of Economics

Mergers and Investments : Where Do We Stand?  (with Leonardo Madio), R&R International Journal of Industrial Organization.

Digital mergers: Recent Insights and Policy Implications (with Chiara Fumagalli, Bruno Jullien, and Michele Polo), R&R Information Economics and Policy

Decentralizing Cooperation Through Bilateral Upstream Agreements (with Doh-Shin Jeon)

Network Centrality and Device Ecosystems (with Doh-Shin Jeon, Yaxin Li, and Tim Simcoe)

Data Sharing or Analytics Sharing? (with Bruno Carballa-Smichowski, Andrea Mantovani, and Carlo Reggiani)

Privacy Protection, Security, and Consumer Retention (with Bruno Jullien and Michael Riordan)

What to Buy When Forum Shopping? Analyzing Court Selection in Patent Litigation (with Fabian Gaessler).

Work in progress

App Store Fees and App Business Models (with José Ignacio Heresi)

Gatekeeping at the Counter: The Regulation of Stacked Payment Platforms (with Renato Gomes)

Data Sharing, Privacy, and Innovation in Healthcare (with Chiara Canta and Anna D'Annunzio)

Mergers and Investments in New Products (with Anna D'Annunzio, Bruno Jullien, and Leonardo Madio)

Patent-Licensing Networks (with Luis Abreu and Doh-Shin Jeon)

Teaching

Toulouse School of Economics (2010-...)

Competition Law and Economics (L3, 2025-...)

Topics and cases in competition policy  (M2, 2011-…)

Economics and econometrics of litigation (M2, 2020-2025)

Law and economics (L3, 2020-2025)

Topics in law and economics (M2, 2019-2020 and 2021-2024)

Industry regulation (M2, 2015-2016 and 2018-2022)

Law and economics of privacy (M2, 2020-2021)

Economics of internet (M2, 2018-2019)

Economics of energy markets and networks (M2, 2017-2018)

Workshop on the law and economics of competition policy (M2, 2014-2017)

Market regulation in the digital world (M2, 2015-2016)

Economics of innovation and intellectual Property (M2, 2015-2016)

Competition law in practice (M2, 2015-2016)

Industrial organization (M1, 2011-2014)

Microeconomics (L3, 2010-2011)

TSE Executive Education (2020-2023)

Recent developments in the economics of merger control (course, 2023)

Recent developments in competition policy (seminar, 2023)

Merger control (course, 2021)

Economics of coopetition (course, 2021)

Ex ante regulation of platforms (seminar, 2020)

Toulouse Law School, University of Toulouse Capitole (2016-2021)

Law and economics of energy (M2, 2020-2021)

Markets and economic theory (M2, 2018-2020)

Market organization (M2, 2016-2018)

CRESSE Summer School (2017-2019)

Regulation of network industries

University of Paris 1 Panthéon Sorbonne (2007-2009)

Risk and Insurance