Hi all; I am going to run models for variable selection using elastic-net. Because I have about 1500 descriptive (independent) variables which they are highly correlated. Before running elastic-net and even single regressions (~1500) I need get fitted values for dependent variables using MIXED model. My question is: Should I used the fitted values or residuals as dependent variable for run elastic-net (even single regressions which is not main purpose)? Your helps are highly appreciated, Greg [[alternative HTML version deleted]]