The paper derives the efficient influence function for optimal policy values in MDPs, proves it does not exist under policy non-uniqueness, and proposes a sequential doubly robust estimator that provides valid conservative inference in such regimes.
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Semiparametric Off-Policy Inference for Optimal Policy Values under Possible Non-Uniqueness
The paper derives the efficient influence function for optimal policy values in MDPs, proves it does not exist under policy non-uniqueness, and proposes a sequential doubly robust estimator that provides valid conservative inference in such regimes.