Author

Lei Shi

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#machine learning Preprint Sep 2026

SIRNET: Causal Adaptation of Pretrained Embeddings for Semiparametric Treatment-Effect Estimation Under Surrogacy

Modern experiments increasingly produce rich post-treatment objects---such as text, images, and video---that may provide early surrogate signals for outcomes that are delayed, expensive, or observed only for a subset of participants. A pretrained encoder can turn such an object into a strong generic embedding, but the...

Lei Shi, Q. Lyu · 0 citations

Preprint Sep 2026

Causal inference in two-sided randomization designs: factorial regression, two-way clustering, and covariate adjustment

We study randomized experiments involving two interacting populations, such as buyers and sellers in a marketplace. In the two-sided experiments we consider, we randomize the two populations separately and independently. For a pair consisting of one member from each population, the two assignments jointly determine one...

Peng-Fei Tian, Ji-Zhou Liu, Lei Shi et al. · 0 citations