An empirical likelihood-based method for comparison of treatment effects-Test of equality of coefficients in linear models

Haiyan Su, Hua Liang

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2 Scopus citations


To compare two treatment effects, which can be described as the difference of the parameters in two linear models, we propose an empirical likelihood-based method to make inference for the difference. Our method is free of the assumptions of normally distributed and homogeneous errors, and equal sample sizes. The empirical likelihood ratio for the difference of the parameters of interest is shown to be asymptotically chi-squared. Simulation experiments illustrate that our method outperforms the published ones. Our method is used to analyze a data set from a drug study.

Original languageEnglish
Pages (from-to)1079-1088
Number of pages10
JournalComputational Statistics and Data Analysis
Issue number4
Publication statusPublished - 1 Apr 2010


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