黃河泉 发表于 2017-12-15 17:41 
看起来应该是用 ivprobit (因为被解释变量是 discrete)。
Maximum likelihood estimation of endogenous switching and sample selection models for binary, ordinal, and count variables这篇介绍ssm的文章说了,Stata has several commands ([R] ivreg,[R] ivprobit, [R] ivtobit) for ML estimation of models with continuous endogenous regressors,所以不适用哈

,只适用于连续内生自变量的