Author

Zachary Liu

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Preprint Aug 2026

Equitable System-Prompt Selection via Constrained Mixed-Strategy GroupDRO

A constrained mixed-strategy GroupDRO framework for system-prompt selection that reduces the Overall Mean, Worst 25% Mean, and Worst by 13.7% on average relative to no mitigation while keeping overall quality close to Average selection.

Mengyu Xu, Qiaoxin Yang, Zhihan Liu et al. · 0 citations