Journal
JOURNAL OF STATISTICAL PLANNING AND INFERENCE
Volume 136, Issue 3, Pages 860-881Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jspi.2004.07.009
Keywords
extra zeros; health care costs; heteroscedastic regression model; retransformation; skewed data; smearing; two-part model
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Two distribution-free estimators are proposed to estimate the mean of a dependent variable after fitting a semiparametric two-part heteroscedastic regression model to a transformation of the dependent variable. We show that the proposed estimators are consistent and have asymptotic normal distributions. We also compare their finite-sample performance in a simulation study. Finally, we illustrate the proposed methods in a real-world example of predicting in-patient health care costs. (c) 2004 Elsevier B.V. All rights reserved.
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