d STB-14 sg18. An improved R-squared. d STB insert by d Patrick Royston, Royal Postgraduate Medical School, d Richard Goldstein, Qualitas Inc. d Support: FAX (011)-44-81-740 3119 and proyston@@rpms.ac.uk d After installation, see help ^brsq^. f sg18/brsq.ado f sg18/brsq.hlp f sg18/scott2.dta