st: test after margins

["Stefan Kreisel" <Stefan.Kreisel@evkb.de>]

Hi all.
Perhaps a simple query?
I've run a complex xtmixed command with all sorts of interactions. Then
I do something like this:
 
margins, at(fazekas=(1 2 3) _dy=0 _startsppb_bps_c=0) atmeans
asbalanced post
 
This gives me the adjusted predictions reading:
 
...
1._at     :    fazekas            = 1
               _ps_q                (asbalanced)
               _dy                = 0
               _startsp~a_c       = 0
2._at
...
3._at
... 
 
Now if I type test as in "test 1._at" that works fine, if I type "test
1._at 2._at 3._at" that works fine as well, giving me
 
(1) 1bn._at
(2) 2._at
(3) 3._at
...
 
But if I type "test 1._at = 2._at" Stata reports "variable _at not
found".
Anybody have an idea?
Cheers
Stefan Kreisel
 


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