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Re: st: Interaction with Squared Term
From
Richard Williams <[email protected]>
To
[email protected], [email protected]
Subject
Re: st: Interaction with Squared Term
Date
Tue, 25 Oct 2011 17:29:15 -0500
At 01:48 PM 10/25/2011, Ryan Goodstein wrote:
Hello,
I am trying to estimate a multinomial logit specification that
includes a categorical variable interacted with a squared term.
Specifically:
> mlogit dq60 invPS##c.o_ltv##c.o_ltv ageq ageq2
Stata (v11) gives me the following error:
> invalid interaction specification;
>
> multiple 'o' operators attached to a single variable are not
allowed within an
> interaction specification{p_end}
I saw a post on this on Stata List from 2009 which says this bug will
be fixed in an update
(http://www.stata.com/statalist/archive/2009-10/msg00584.html), but I
haven't been able to find an update. Has this bug been fixed?
I've just tried commands that appear similar to me with no problems.
The fact that you say "I haven't been able to find an update" and
that you say you are using Stata (v11) rather than Stata (v11.2) make
me wonder if you are clear on how to update. There is nothing you
need to find. Just give the command
update all
and Stata will take it from there (assuming you have write access to
your machine). If you do indeed have the latest and greatest version
of Stata 11.2 and still have problems, let us know.
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: [email protected]
WWW: http://www.nd.edu/~rwilliam
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