Quasi Score and Corrected Score Estimation in the Polynomial Measurement Error Model

Abstract

Despite the many results that have been found in recent years on the estimation of regression coefficients of a polynomial model with measurement errors in the covariable, cf., e.g., Cheng and Schneeweiss (1998), Cheng and Schneeweiss (2002), Kukush et al. (2005), Kukush and Schneeweiss (2005), Shklyar et al. (2007), some issues concerning the computation of estimators and their asymptotic covariance matrices (ACM) are still open to investigation.