log using nwest.out, replace

use c:\stata\auto, clear
nwest regress price weight displ
newey price weight displ, lag(0)
regress price weight displ, rob

use dta/poiss, clear
tab agecat, gen(a)
poisson deaths smokes a2-a5, exposure(pyears) irr
nwest poisson deaths smokes a2-a5, exposure(pyears) irr

clear
set mem 10m
use dta/probit, clear
probit union age grade not_smsa south southXt
nwest probit union age grade not_smsa south southXt, lag(2) t(time) 

log close