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Author

Chung-Piaw Teo

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Preprint Sep 2026

Learning Choice Model Trees for Feature-Based Multi-Product Pricing: Exact Optimization and Field Evidence

Feature-based multi-product pricing uses customer characteristics to identify demand heterogeneity and tailor prices across products. Choice model trees segment customers through interpretable feature rules and fit a demand model within each leaf. Existing methods typically construct these trees greedily, selecting one...

Jia-Jie Zhang, Yan-Qiu Ruan, Xiao Jin et al. · 0 citations
Preprint Sep 2026

Optimizer as Detector: Stochastic Gradient Descent for Latent Mixture Models

Pooling latent subpopulations can obscure relationships and yield misleading regression conclusions, including Simpson's paradox (SP). We propose a detector based on the steady-state dynamics of constant-step stochastic gradient descent (SGD). Unlike likelihood-based mixture tests and confounder-search methods, it requ...

Ye Shi, Xiao Jin, Chung-Piaw Teo · 0 citations

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