use hsng2.dta, clear
ivregress gmm rent pcturban (hsngval = faminc reg2-reg4), small
est store gmm
regress rent pcturban hsngval
est store ols
hausman gmm ols
这是高级视频班的,前面执行都对,然后我执行最后那条命令时,显示红色字样:
hausman cannot be used with vce(robust), vce(cluster cvar), or p-weighted data
不知道是怎么回事