Dear users of collinearity analyses, the function package bkw.gfn by Lee Adkins is going to be retired soon. The reason is that its functionality has been integrated into gretl itself via the new 'bkw' command and 'bkw()' function. See the documentation in gretl 2019b (excellent as always). Please speak up if you need a little transition period. Apart from that, you can of course always keep a local copy of the package for your own use. cheers sven