d STB-37 ssa9. Cox proportional hazards model with exact calc. for ties. d STB insert by William Gould, Stata Corporation. d Support: wgould@@stata.corp d After installation, see help ^stcoxe^ and help ^st_rpool^. f ssa9/st_rpool.ado f ssa9/st_rpool.hlp f ssa9/stcoxe.ado f ssa9/stcoxe.hlp