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"Activists from the UK action group Everyone hates Elon and Greenpeace Italy unfolded a giant 20x20m banner reading “If you can rent Venice for your wedding, you can pay more tax” on Piazza San Marco, as Jeff Bezos is due to celebrate his reportedly multi-million wedding in the lagoon city this week."
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Statistical Inference for Misspecified Contextual Bandits
Yongyi Guo, Ziping Xu
https://arxiv.org/abs/2509.06287 https://arxiv.org/pdf/2509.06287

Statistical Inference for Misspecified Contextual Bandits
Contextual bandit algorithms have transformed modern experimentation by enabling real-time adaptation for personalized treatment and efficient use of data. Yet these advantages create challenges for statistical inference due to adaptivity. A fundamental property that supports valid inference is policy convergence, meaning that action-selection probabilities converge in probability given the context. Convergence ensures replicability of adaptive experiments and stability of online algorithms. In…