st: Fixed effects with almost time invariant dummies

["Roy,Suryadipta" <suryadipta.roy@lawrence.edu>]

Hi,

I am trying to use the -xtfevd- command for FE regressions 
with time-invariant and almost time-invariant variables. 
However, I am getting the following error message-
 
unrecognized command: xtfevd.

Moreover, -findit xtfevd- does not bring up any 
information.

It would be great if someone could point out as to what I 
need to do for stata to recognize the command.

Thanks as usual!
Suryadipta.
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