期刊
STATISTICS & PROBABILITY LETTERS
卷 83, 期 6, 页码 1553-1558出版社
ELSEVIER
DOI: 10.1016/j.spl.2013.02.021
关键词
Correlated data; Efficiency; Generalized estimating equations; Marginal model; Working correlation structure
Notable bias can exist in the empirical covariance matrix of parameter estimates obtained from the quadratic inference function method that incorporates an unstructured working correlation. We therefore derive a bias correction. Via simulation, we show that the proposed correction leads to appropriate standard error estimation. (C) 2013 Elsevier B.V. All rights reserved.
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