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Armin Behnamnia

2 accepted papers

2025

Log-Sum-Exponential Estimator for Off-Policy Evaluation and Learning

ICML 2025spotlight

Off-policy learning and evaluation leverage logged bandit feedback datasets, which contain context, action, propensity score, and feedback for each data point. These scenarios face significant challenges due to high variance and poor performance with low-quality propensity scores and heavy-tailed re…

2025

Pessimistic Data Integration for Policy Evaluation

NeurIPS 2025poster

This paper studies how to integrate historical control data with experimental data to enhance A/B testing, while addressing the distributional shift between historical and experimental datasets. We propose a pessimistic data integration method that combines two causal effect estimators constructed b…

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