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Author

Fan Li

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Preprint Sep 2026

Nonparametric heterogeneous causal mediation with orthogonal machine learning

Causal mediation analysis decomposes the total effect of an intervention on an outcome into a direct pathway and an indirect pathway transmitted through a mediator, but standard methods typically summarize these pathways using population average effects. In many applications, however, the indirect effect may vary subst...

Jia-Qi Tong, Yi Zhao, Bhramar Mukherjee et al. · 0 citations
Preprint Aug 2026

Orthogonal double residual learning for optimal individualized treatment rules

Individualized treatment rules (ITRs) map baseline characteristics to treatment recommendations, with the optimal ITR maximizing expected reward or policy welfare. Indirect methods may require restrictive modeling assumptions, whereas direct methods can be sensitive to nuisance estimation error and limited overlap. We...

Jia-Qi Tong, Fan Li · 0 citations

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