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Si-Di Chang

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Sep 2026

Measurement Risk in LLM-Based Financial NLP: Rubric and Metric Sensitivity on JF-ICR

Large language models are increasingly used to read earnings calls, investor-relations Q&A, guidance, and disclosure language. In this setting, supervised financial NLP benchmarks can become evidence for vendor selection, deployment approval, and model-risk records. Gold labels, however, do not make a benchmark score a...

Si-Di Chang, Pei-Ke Zhu, Yu-Xiao Chen et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Refuse, Decompose, Refresh: A Claim-Safe Protocol for Closed-Loop AI Evaluation

An AI evaluation can be perfectly reproducible and still support the wrong claim. This risk is acute in closed-loop systems: policy determines visited states, observable components, and which failures leave a measurable trace. We propose a claim-safe protocol with three actions. Refuse: abstain when a clean reference s...

Pei-Ke Zhu, Si-Di Chang · 0 citations
#artificial intelligence Review Sep 2026

Four Ledgers, Not One Score: Responsible Communication of LLM-Judge Calibration in Biomedical ML

Synthetic perturbations appear to offer inexpensive calibration data for LLM evaluators in biomedical ML, where expert review is scarce. Yet a planted mutation key is neither a detector output nor automatically human ground truth. We formalize four distinct ledgers: planted perturbations, independent detector outputs,...

Si-Di Chang, Pei-Ke Zhu · 0 citations
#artificial intelligence Preprint Sep 2026

When Guardrails Look Effective: Construct Validity Failures in LLM Agent Commerce Evaluation

The case does not show that guardrails are ineffective; it shows their apparent value is unidentified until the simulated agents and protocol pass these checks, and contributes a construct-validity contract separating incentive validity, protocol isolation, stochastic stability, and welfare accounting.

Pei-Ke Zhu, Si-Di Chang · 1 citation

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