d STB_45 sg91. Robust variance est. for MLE Poisson & neg. binomial reg. d STB insert by Joseph Hilbe, Arizona State University. d Support: hilbe@@asu.edu d After installation, see help ^nbinreg^ and help ^poisml^. f sg91/mypoislf.ado f sg91/nbinlf.ado f sg91/nbinreg.ado f sg91/nbinreg.hlp f sg91/poisml.ado f sg91/poisml.hlp f sg91/medpar.dta