Régulation des plateformes numériques - Prochaine séance

Intervenant : Alireza Fallah - University of California, Berkeley

Papier : On Three-Layer Data Markets
(Sur les marchés de données à trois niveaux)

Abstract : We study a three-layer data market comprising users (data owners), platforms, and a data buyer. Each user benefits from platform services in exchange for data, incurring privacy loss when their data, albeit noisily, is shared with the buyer. The user chooses platforms to share data with, while platforms decide on data noise levels and pricing before selling to the buyer. The buyer selects platforms to purchase data from. We model these interactions via a multi-stage game, focusing on the subgame Nash equilibrium. We find that when the buyer places a high value on user data (and platforms can command high prices), all platforms offer services to the user who joins and shares data with every platform. Conversely, when the buyer’s valuation of user data is low, only large platforms with low service costs can afford to serve users. In this scenario, users exclusively join and share data with these low-cost platforms. Interestingly, increased competition benefits the buyer, not the user: as the number of platforms increases, the user utility does not necessarily improve while the buyer utility improves. However, increasing the competition improves the overall utilitarian welfare. Building on our analysis, we then study regulations to improve the user utility. We discover that banning data sharing maximizes user utility only when all platforms are low-cost. In mixed markets of high- and low-cost platforms, users prefer a minimum noise mandate over a sharing ban. Imposing this mandate on high-cost platforms and banning data sharing for low-cost ones further enhances user utility.

Informations importantes :

• Ici, le lien Microsoft Teams de la séance. La session durera 90 minutes (questions et réponses incluses).
• Le groupe de travail fait partie des activités de la Chaire Gouvernance et Régulation de l'Université Paris Dauphine-PSL. Le groupe se réunit une fois toutes les deux semaines pour discuter, partager et présenter des documents de travail et/ou des idées concernant les développements récents dans le domaine de la régulation des plateformes. Nous avons des présentateurs internes et externes pour partager leur travail.
• Si vous souhaitez présenter votre travail ou si vous pensez à quelqu'un pour le faire, veuillez envoyer un courriel à l'adresse suivante lucas.eustache@dauphine.psl.eu.