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Medicine and Health Sciences Commons

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Statistical Models

UW Biostatistics Working Paper Series

Series

2004

Single-index model

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Full-Text Articles in Medicine and Health Sciences

Semi-Parametric Single-Index Two-Part Regression Models, Xiao-Hua Zhou, Hua Liang Dec 2004

Semi-Parametric Single-Index Two-Part Regression Models, Xiao-Hua Zhou, Hua Liang

UW Biostatistics Working Paper Series

In this paper, we proposed a semi-parametric single-index two-part regression model to weaken assumptions in parametric regression methods that were frequently used in the analysis of skewed data with additional zero values. The estimation procedure for the parameters of interest in the model was easily implemented. The proposed estimators were shown to be consistent and asymptotically normal. Through a simulation study, we showed that the proposed estimators have reasonable finite-sample performance. We illustrated the application of the proposed method in one real study on the analysis of health care costs.