Author

Lucy Xia

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Preprint Sep 2026

Is the regression $F$-test doubly robust?

We study the robustness of the $F$-test in random design linear models, and reach a somewhat nuanced conclusion. On the positive side, one of our main results is that the size of the test is close to its nominal level as soon as either the distribution of the normalised error vector is close to uniform on the unit sphe...

Lucy Xia, Oliver Y. Feng, Yang Feng et al. · 0 citations

#natural language process... Preprint Oct 2026

Stance Drift: How AI-mediated Communication Distorts Our Message

Large language models (LLMs) increasingly mediate human communication, from drafting emails to summarizing scientific reports, yet whether they faithfully preserve a speaker's position remains largely untested. We model AI-mediated communication as a two-step generation-extraction pipeline: one LLM produces an argument...

Ling-Chong Liu, Yan-Fei Zhou, Jacob Bien et al. · 0 citations