[R] hierarchical partitioning

Ulrike Grömping groemping at tfh-berlin.de
Thu Mar 16 18:12:50 CET 2006

Dear Meike,

a variable with negative entry for J in IJ (I cannot become negative) 
explains more in the joint model than it can explain when alone in the model. 
You can find discussions of such phenomena e.g. under the key 
word "suppression" or "suppressor variables".

And by the way, as you are using hier.part, you might also be interested in 
the package relaimpo (linear model with R-squared only, but more different 
metrics for partitioning).

Regards, Ulrike

Prof. Dr. Ulrike Grömping 
Fachbereich II 
TFH Berlin 
Luxemburger Str. 10 
13353 Berlin
www: www.tfh-berlin.de/~groemp/

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