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AW: st: AW: Interaction with squared variable


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   AW: st: AW: Interaction with squared variable
Date   Tue, 13 Oct 2009 17:32:10 +0200

<> 

I used to think that the expansion of the -fvvarlist- happened
"independently" of the estimation command that requested it...



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Nick Winter
Gesendet: Dienstag, 13. Oktober 2009 17:29
An: statalist@hsphsun2.harvard.edu
Betreff: Re: st: AW: Interaction with squared variable

I can reproduce this with the auto dataset.  Seems like something for 
technical support...


. regress rep78 i.foreign c.weight  c.weight#c.weight 
i.foreign#(c.weight#c.weight)

<<model estimation output omitted>>

. oprobit rep78 i.foreign c.weight  c.weight#c.weight 
i.foreign#(c.weight#c.weight)

invalid interaction specification;

multiple 'o' operators attached to a single variable are not allowed 
within an interaction specification{p_end}
r(198);


Nick Winter



Giuseppe Cappelletti wrote:
> This is the message I get when I use the command ( oprobit  y
> i.gender c.x  c.x#c.x  i.gender#(c.x#c.x) )
> "invalid interaction specification;
> multiple 'o' operators attached to a single variable are not allowed
> within an interaction specification{p_end}"
> 
> The same command works if I use a linear model that is regress y
> i.gender c.x  c.x#c.x  i.gender#(c.x#c.x).
> 
> Thanks  in advance
> 
> Giuseppe
> 
> <>
> 
> " but it does not work".
> 
> 
> What exactly does not work? Note the FAQ onthis point...
> 
> 
> 
> HTH
> Martin
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-- 
--------------------------------------------------------------
Nicholas Winter                                 434.924.6994 t
Assistant Professor                             434.924.3359 f
Department of Politics                  nwinter@virginia.edu e
University of Virginia          faculty.virginia.edu/nwinter w
PO Box 400787, 100 Cabell Hall
Charlottesville, VA 22904

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