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STICERD Economic Theory Seminars

Keeping the Agents in the Dark: Private Disclosures in Competing Mechanisms

Thomas Mariotti (Toulouse), joint with Andrea Attar, Eloisa Campioni and Alessandro Pavan

Thursday 19 May 2022 15:30 - 17:00

This event is both online and in person

32L 3.05, 3rd Floor Conference Room, LSE, 32 Lincoln's Inn Fields, London WC2A 3PH

Many of our seminars and public events this year will continue as online seminars or as online and in person. Please check our website listings and Twitter feed @STICERD_LSE for updates.

Unless otherwise specified, current restrictions mean in-person seminars are only open to members of the LSE community (those with a valid LSE ID card).

Those unable to join the seminars in-person are welcome to participate via zoom.

About this event

We study competing-mechanism games, in which several principals contract with several privately informed agents. We show that enabling the principals to engage into private disclosures—whereby a principal sends to the agents contractible private signals about how her final decision will respond to the agents’ messages—can significantly affect the predictions of such games. Our first result is that equilibrium outcomes and payoffs of games without private disclosures may not be supported when private disclosures are allowed for. This challenges the robustness of the folk theorems `a la Yamashita (2010). Our second result is that allowing for private disclosures may generate equilibrium outcomes and payoffs that cannot be supported in any game without private disclosures, no matter how rich the message spaces are. This challenges the canonicity of the universal mechanisms of Epstein and Peters (1999). Together, these findings call for a novel approach to the analysis of competing-mechanism games.

Economic Theory Seminars are held on Thursdays in term time at 15:30-17:00, ONLINE or ONLINE AND IN PERSON at the same time.

Seminar organisers: Dr Andrew Ellis and Dr Christopher Sandmann.

For further information please contact Annie-Rose Nicholas by email:

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This event will take place in 32L 3.05, 3rd Floor Conference Room, LSE, 32 Lincoln's Inn Fields, London WC2A 3PH.

The building is labelled 32L on the map. Enter the building via Lincoln's Inn Fields.

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