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Journal of Korean Society for Quality Management > Volume 27(2); 1999 > Article
Journal of Korean Society for Quality Management 1999;27(2): 112-.
중도 절단된 자료에 대한 적은 로버스트 회귀
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이화여대 통계학과
Adaptive Robust Regression for Censored Data
Chul-Ki Kim
Dept. of Statistics, Ewha Womans University
ABSTRACT
In a robust regression model, it is typically assumed that the errors are normally distributed. However, what if the error distribution is deviated from the normality and the response variables are not completely observable due to censoring? For complete data, Kim and Lai(1998) suggested a new adaptive M-estimator with an asymptotically efficient score function. The adaptive M-estimator is based on using B-splines to estimate the score function and simple cross validation to determine the knots of the B-splines, which are a modified version of Kun( 1992). We herein extend this method to right-censored data and study how well the adaptive M-estimator performs for various error distributions and censoring rates. Some impressive simulation results are shown.
Key Words: Adaptive M-estimator;Asymptotically efficient score function;Right-censored data;
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