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Good Cop, Bad Cop:Delegating Interrogations

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151

Abstract

A decision- maker who aims to find the truth from a suspect delegates to an interrogator with possibly misaligned preferences. The ideal interrogator is always misaligned: sometimes nicer, sometimes tougher. The decision-maker can further improve by conditioning the delegation on the evidence, which is her private information, appointing a nice interrogator when the evidence is weak and a tougher interrogator when the evidence is strong. Dynamic, endogenous,conditional delegation can credibly convey information about the strength of the evidence and implement the overall optimum with full commitment. More-over, the decision-maker can then retain authority over decisions by relying on the interrogator’s recommendations.

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