Geodesic
Variance components estimation in generalized orthogonal models
Discussiones Mathematicae. Probability and Statistics, Tome 27 (2007) no. 1-2, pp. 99-115.

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The model y = ∑_j=1^w X_j β̲_j + e̲ is generalized orthogonal if the orthogonal projection matrices on the range spaces of matrices X_j, j = 1, ..., w, commute. Unbiased estimators are obtained for the variance components of such models with cross-nesting.
Keywords: generalized orthogonal models, variance components, generalized cross nesting designs 
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Fernandes, Célia; Ramos, Paulo; Ferreira, Sandra; Mexia, João. Variance components estimation in generalized orthogonal models. Discussiones Mathematicae. Probability and Statistics, Tome 27 (2007) no. 1-2, pp. 99-115. http://geodesic.mathdoc.fr/item/DMPS_2007_27_1-2_a5/

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