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02.1.1. LS and BLUE Are Algebraically Identical—Solution

Richard William Farebrother

Econometric Theory, 2003, vol. 19, issue 1, 226-227

Abstract: Let Z be an n × (n − q) matrix of rank n − q whose columns span the space orthogonal to the space spanned by the columns of X and let f = Z′y. Then, on premultiplying by the n × n nonsingular matrix [Z : X], we find that the conventional least squares problem.

Date: 2003
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