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STATISTICS & PROBABILITY LETTERS
Volume 78, Issue 15, Pages 2275-2280Publisher
ELSEVIER
DOI: 10.1016/j.spl.2008.01.097
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In several dimension reduction techniques, the original variables are replaced by a smaller number of linear combinations. The coefficients of these linear combinations are typically the elements of the left singular vectors of a random matrix. We derive the asymptotic distribution of the left singular vectors of a random matrix that has a normal limit distribution. This result is then used to develop a Wald-type test for testing variable importance in Sliced Inverse Regression (SIR) and Sliced Average Variance Estimation (SAVE), two popular sufficient dimension reduction methods. (C) 2008 Elsevier B.V. All rights reserved.
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