Heij, C.; Groenen, P.J.F.; Dijk, D.J.C. van - Erasmus University Rotterdam, Econometric Institute - 2005
.
Key words: principal components, principal covariates, regression model, factor
model, economic forecasting
1 Introduction … information is first
summarized by a (small) number of principal components, which are then
used as prediction factors in a low … estimated by means of principal components.
That is, the p factors are obtained by minimizing the squared Frobenius norm
jjX …