This site corresponds to the (submitted) papers

Mark A. van de Wiel, Tonje G. Lien, Wina Verlaat, Wessel N. van Wieringen, Saskia M. Wilting (2016).  Better prediction by use of co-data: Adaptive group-regularized ridge regression. 
Stat Med. 35, 368-381.
Preliminary version. Supplementary Information

R package GRridge is now (20/4/2016) available on Github.


Please read the ReadMe file for more information.
I appreciate feedback!  mark.vdwiel[at]