Seasonal Unit Root Test for Monthly data.

[Xiaojin Wang]

I know in Stata there are two commands available for testing seasonal unit root hegy4 and sroot. But they are designed only for quarterly data.
Does anyone know how to do a seasonal unit root test for monthly data？

Thanks.

[Doro Drees]

Hello! I am also trying to compute a seasonal unit root test for monthly data currently. Did you find any solution to do this in Stata?