Cong Ma 0001 Banghua Zhu Jiantao Jiao Martin J. Wainwright Minimax Off-Policy Evaluation for Multi-Armed Bandits. 5314-5339 2022 68 IEEE Trans. Inf. Theory 8 https://doi.org/10.1109/TIT.2022.3162335 db/journals/tit/tit68.html#MaZJW22