st: Forecasting interval and robust estimation

["VIVIAND Xavier" <xavier.viviand@mail.ap-hm.fr>]

Dear StataList,


I would like to get the forecasting interval for a new observation in a study based
on a growth model with repeated data.  When I try to use the option stdf in predict after  :
	reg weight time, robust cluster(id)
I get the message: "stdf not allowed after robust estimation"
Moreover, stdf is not allowed after xtreg.

Does someone know how to calculate this interval ?
Sincerely yours,

Xavier VIVIAND, M.D./



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