Selecting a Winner with Impartial Referees

Prelegent(ci)

Marcin Dziubiński

Afiliacja

University of Warsaw

Termin

6 października 2022 12:00

Informacje na temat wydarzenia

online seminar

Seminarium

Seminarium „Gry, mechanizmy i sieci społeczne”

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We consider a problem of mechanism design without money, where a planner selects a winner among a set of agents with binary types and receives outside signals (like the report of impartial referees). We show that there is a gap between the optimal Dominant Strategy Incentive Compatible (DSIC) mechanism and the optimal Bayesian Incentive Compatible (BIC) mechanism. In the optimal BIC mechanism, the planner can leverage the outside signal to elicit information about agents’ types. BIC mechanisms are lexicographic mechanisms, where the planner first shortlists agents who receive high reports from the referees and then uses agents’ reports to break ties among agents in the shortlist. We compare the "self-evaluation" mechanism with a "peer evaluation" mechanism where agents evaluate other agents, and show that for the same signal precision, the self-evaluation mechanism outperforms the peer evaluation mechanism.

 

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