Dear all, this is again an announcement about contributed function package reorganization: The package MCO_Ridge.gfn by Uriel Rodríguez Ramírez is going to be retired soon due to certain technical issues. Uriel couldn't be reached anymore to update the package. If you are an active user of the package you would have to keep a local copy for yourself. Alternatively you could use the package ridge.gfn which has been available since 2017 and which also performs Ridge regression, as the name suggests. (Disclaimer: I am the author of ridge.gfn, but this has nothing to do with the removal of MCO_Ridge as the two packages have lived happily in coexistence so far. Obviously this is open source software and I don't get any profit from it.) cheers sven