Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: Bug in margins
From
Richard Williams <[email protected]>
To
[email protected], [email protected]
Subject
Re: st: Bug in margins
Date
Fri, 30 Aug 2013 11:51:22 -0500
First off, your 2 logistic commands look identical to me. I'm
guessing that when you ran it the first time and got the error, you
did not have the i.
Assuming that is the case, this is no error. The i. tells Stata that
the variable is categorical rather than continuous. See the help for
margins. Or, for some highlights on the margins command, see
http://www3.nd.edu/~rwilliam/stats/Margins01.pdf
At 10:39 AM 8/30/2013, roland andersson wrote:
I am analysing a logistic regression model, binary outcome. I want to
analyse the adjusted proportion of the outcome for a binary (0/1)
covariate.
I run the logistic model followed by margins
. logistic dod30dgr i.lapscopiintent alder aldersq........
. margins lapscopiintent
I get an error
'lapscopiintent' not found in list of covariates
r(322);
If I put i. before the binary variable I am interested in
. logistic dod30dgr i.lapscopiintent alder aldersq................
. margins lapscopiintent
Predictive margins Number of obs = 166811
Model VCE : OIM
Expression : Pr(dod30dgr), predict()
Delta-method
Margin Std. Err. z P>z [95% Conf. Interval]
lapscopiin~t
0 .0015466 .0000985 15.70 0.000 .0013535 .0017397
1 .0011487 .0002518 4.56 0.000 .0006552 .0016421
I assume this is a bug?
Roland Andersson
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/
-------------------------------------------
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
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/