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Author

Luan Pham

RMIT University

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#machine learning Preprint Sep 2026

Where Root Cause Analysis Fails: A Retrieval-Reranking Decomposition

A retrieval-reranking decomposition is introduced and a two-stage pipeline combining a multi-signal retriever with an LLM reranker that matches or exceeds the best baseline's top@1 accuracy on all six benchmark suites, with no causal graph or labeled data required.

H. Muhammad, Luan Pham, Laure Barriere et al. · 0 citations
Preprint Aug 2026

Target-Weighted Neyman Allocation: Experimental Design for Heterogeneous Treatment Effects under Population Shift

Randomized experiments are often run in one population to guide decisions in another. Allocating by experimental proportions wastes budget on groups that rarely appear in deployment, whereas allocating by deployment proportions under-samples groups that are hard to measure precisely. We propose \textbf{TWNA} (Target-We...

Hoang Dang, Luan Pham, Minh Nguyen · 0 citations

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