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Two-sample empirical likelihood method for difference between coefficients in linear regression model
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Two-sample empirical likelihood method for difference between coefficients in linear regression model
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Journal Article
Two-sample empirical likelihood method for difference between coefficients in linear regression model
2012
Overview
The empirical likelihood method is proposed to construct the confidence regions for the difference in value between coefficients of two-sample linear regression model. Unlike existing empirical likelihood procedures for one-sample linear regression models, as the empirical likelihood ratio function is not concave, the usual maximum empirical likelihood estimation cannot be obtained directly. To overcome this problem, we propose to incorporate a natural and well-explained restriction into likelihood function and obtain a restricted empirical likelihood ratio statistic (RELR). It is shown that RELR has an asymptotic chi-squared distribution. Furthermore, to improve the coverage accuracy of the confidence regions, a Bartlett correction is applied. The effectiveness of the proposed approach is demonstrated by a simulation study.
Publisher
Springer-Verlag,Springer Nature B.V
