A hybrid model for zero-inflated proportion data

Yangzi Zheng; Qian Li; Binyan Jiang; Pinjun Dong

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arXiv · 2611.09432

A hybrid model for zero-inflated proportion data

Yangzi Zheng·Qian Li·Binyan Jiang·Pinjun Dong

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Abstract

This paper proposes a hybrid model for analyzing zero-inflated proportion data by distinguishing two types of zeros. The first type arises from sampling variability, whereas the second reflects intrinsically unsuitable covariates. Accordingly, the hybrid model combines a regression component for suitable observations with an estimator of the suitability region that identifies unsuitable covariates. Using a debiasing technique, we establish the consistency of both the regression and classification components, together with the asymptotic normality of the regression coefficient and a convergence rate for the support estimator. Comprehensive simulation studies verify our theoretical findings. We further apply the model to two real datasets, where it outperforms most competing methods.

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Yangzi Zheng, Qian Li, Binyan Jiang, Pinjun Dong. 2026-11-06. A hybrid model for zero-inflated proportion data. https://arxiv.org/abs/2611.09432

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