On the shrinkage behavior of partial least squares regression

Details On the shrinkage behavior of partial least squares regression On the shrinkage behavior of partial least squares regression

2005-03-23

arxiv.org/abs/math/0503495v1

Mathematics

Statistics Theory

Scientific paper

We present a formula for the shrinkage factors of the Partial Least Squares regression estimator and deduce some of their properties, in particular the known fact that some of the factors are >1. We investigate the effect of shrinkage factors for the Mean Squared error of linear estimators and illustrate that we cannot extend the results to nonlinear estimators. In particular, shrinkage factors >1 do not automatically lead to a poorer Mean Squared Error. We investigate empirically the effect of bounding the the absolute value of the Partial Least Squares shrinkage factors by 1.

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