Author

Hao-Jia Zhao

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Preprint Sep 2026

Testing for Heterogeneous Treatment Effects in Regression Discontinuity Designs

We propose a nonparametric test for unobserved treatment effect heterogeneity in regression discontinuity designs. Under the null of no unobserved heterogeneity, a transformed outcome that imputes treated potential outcomes for untreated units must have a continuous conditional distribution at the cutoff. We convert th...

Xiao-Jun Song, Hao-Jia Zhao · 0 citations

Open access Jul 2026

Single-cell expression quantitative trait loci-based Mendelian randomization identifies MAN1A2 in naive CD4+ T cells as a candidate therapeutic target for osteoarthritis.

BACKGROUND Osteoarthritis (OA) is a leading cause of chronic pain and disability worldwide, with growing evidence implicating immune dysregulation in its pathogenesis. However, the specific peripheral immune cell populations contributing causally to OA risk remain poorly characterized. METHODS We performed a multi-st...

Xuanyi Zhou, Fangyu Liu, Yan Zhang et al. · Experimental Gerontology · 0 citations