Yi, Grace Y.; He, Wenqing; Liang, Hua - In: Journal of Multivariate Analysis 100 (2009) 2, pp. 278-290
Clustered data arise commonly in practice and it is often of interest to estimate the mean response parameters as well as the association parameters. However, most research has been directed to address the mean response parameters with the association parameters relegated to a nuisance role....
