Some properties of projectors associated with the WLSE under a general linear model

Yongge Tian () and Yoshio Takane

Journal of Multivariate Analysis, 2008, vol. 99, issue 6, 1070-1082

Abstract: Projectors associated with a particular estimator in a general linear model play an important role in characterizing statistical properties of the estimator. A variety of new properties were derived on projectors associated with the weighted least-squares estimator (WLSE). These properties include maximal and minimal possible ranks, rank invariance, uniqueness, idempotency, and other equalities involving the projectors. Applications of these properties were also suggested. Proofs of the main theorems demonstrate how to use the matrix rank method for deriving various equalities involving the projectors under the general linear model.

Keywords: General; linear; model; Weighted; least-squares; estimator; Projectors; Generalized; inverses; of; matrices; Rank; formulas; for; partitioned; matrix; Elementary; block; matrix; operations; (EBMOs) (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (4)

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