A - Papers appearing in refereed journals
Welham, S. J. and Thompson, R. 1997. Likelihood ratio tests for fixed model terms using residual maximum likelihood. Journal of the Royal Statistical Society, Series B (Statistical Methodology). 59 (3), pp. 701-714.
|Authors||Welham, S. J. and Thompson, R.|
Likelihood ratio tests for fixed model terms are proposed for the analysis of linear mixed models when using residual maximum likelihood estimation. Bartlett-type adjustments, using an approximate decomposition of the data, are developed for the test statistics. A simulation study is used to compare properties of the test statistics proposed, with or without adjustment, with a Ward test. A proposed test statistic constructed by dropping fixed terms from the full fixed model is shown to give a better approximation to the asymptotic chi(2)-distribution than the Wald test for small data sets. Bartlett adjustment is shown to improve the chi(2)-approximation for the proposed tests substantially.
|Keywords||Statistics & Probability|
|Year of Publication||1997|
|Journal||Journal of the Royal Statistical Society, Series B (Statistical Methodology)|
|Journal citation||59 (3), pp. 701-714|
|Digital Object Identifier (DOI)||doi:10.1111/1467-9868.00092|
|Open access||Published as non-open access|
|Funder project or code||207|
|Copyright license||Publisher copyright|
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