d STB-49 sg112. Nonlin. reg. models with power or exp. functs of covars. d STB insert by Patrick Royston, Imperial College School of Medicine, UK; d Gareth Ambler, Imperial College School of Medicine, UK. d Support: proyston@@rpms.ac.uk and gambler@@rpms.ac.uk d After installation, see help ^boxtid^, help ^fracpoly^, and help ^fracpred^. f sg112/boxtid.ado f sg112/boxtid.hlp f sg112/frac_ext.ado f sg112/brcancer.dta f sg112/femur.dta