用STATA帮助的例子操作的,但还是有报错。
Examples
Setup
. webuse abdata
Basic model with strictly exogenous covariates and two lags of the the
dependent variable
. xtdpdsys n l(0/1).w l(0/2).(k ys) yr1980-yr1984, lags(2)
Same model with a robust VCE
. xtdpdsys n l(0/1).w l(0/2).(k ys) yr1980-yr1984, lags(2)
vce(robust)
Twostep estimator of the same model with a robust VCE
. xtdpdsys n l(0/1).w l(0/2).(k ys) yr1980-yr1984, lags(2) twostep
vce(robust)
总是出现:
unrecognized command: is_svy
r(199);
望请大侠相助,不胜感谢!


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