为什么我用
cmp setup
webuse laborsup, clear
cmp (kids = fem_educ) (fem_educ = fem_work), ind(cmpoprobitcmp_cont) tech(dfp) nolr
结果显示
The indicators() option must contain 2 variables, one for each equation. Did you forget to type cmp setup?
invalid syntax
请问是怎么回事,该怎么处理呢?