Summary Measurement errors in covariates may result in biased estimates in regression analysis. Most methods to correct this bias assume nondifferential measurement errors—i.e., that measurement errors are independent of the response variable. However,
in regression models for zero‐truncated count data, the number of error‐prone covariate measurements for a given observational unit can equal its response count, implying a situation of differential measurement errors. To address this challenge, we develop a modified conditional
score approach to achieve consistent estimation. The proposed method represents a novel technique, with efficiency gains achieved by augmenting random errors, and performs well in a simulation study. The method is demonstrated in an ecology application.
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Document Type: Research Article
Department of Mathematics, Tamkang University, New Taipei City, Taiwan
Institute of Statistics, National Chung Hsing University, Taichung, Taiwan
Publication date: 2011-12-01