. ivtobit risk_r [ son male age education married health risk_p finan_k size age_ch business debtratio logincome loghouse l
> ogeducation_ex daiji rural loggnp i.time i.prov ] ( ss_1 sex_ratio_1 = RR nation_ratio ),ll(0) ul(1) first twostep
这是我的命令，想问下各路大神能不能帮忙解决下，急！
no endogenous variables; use tobit instead这个是 stata报错，不知道问题出在哪里了