d STB-58 sxd2. Computing optimal sampling designs for two-stage studies d STB insert by Marie Reilly, Epidemiology & Public Health, Univ College, d Cork, Ireland d Agus Salim, Department of Statistics, University College, d Cork, Ireland d Support: marie.reilly@@ucc.ie, a.salim@@ucc.ie d After installation, see help ^optfixn^, help ^optbud^, help ^optprec^, d and help ^coding^ f sxd2/coding.ado f sxd2/coding.hlp f sxd2/ectopic.dta f sxd2/msopt.ado f sxd2/optbud.ado f sxd2/optbud.hlp f sxd2/optfixn.ado f sxd2/optfixn.hlp f sxd2/optprec.ado f sxd2/optprec.hlp f sxd2/pilotcas.dta f sxd2/sim_miss.dta f sxd2/wtpilot.dta