Skip to main content

STICERD Economic Theory Seminars

Dynamic Incentives in Incompletely Specified Environments

Gabriel Carroll (Stanford University)

Thursday 11 November 2021 15:30 - 17:00

This event will take place online.

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

Consider a repeated interaction where it is unknown which of various stage games will be played each period. This framework captures the logic of intertemporal incentives even though numeric payoffs to any strategy profile are indeterminate. A natural solution concept is ex post perfect equilibrium (XPE): strategies must form a subgame-perfect equilibrium for any realization of the sequence of stage games. When (i) there is one long-run player and others are short-run, and (ii) public randomization is available, we can adapt the standard recursive approach to determine the maximum sustainable gap between reward and punishment. This leads to an explicit characterization of what outcomes are supportable in equilibrium, and an optimal penal code that supports them. Any non-XPE-supportable outcome fails to be an SPE outcome for some (possibly ambiguous) specification of the stage games. Unlike in standard repeated games, restrictions (i) and (ii) are crucial.

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 Francesco Nava.

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

Please use this link to subscribe or unsubscribe to the Economic Theory seminars mailing list (etheory).

This event will take place online.