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Re: st: RE: Stata list example - use of the margins command
From
[email protected] (Brendan Halpin)
To
[email protected]
Subject
Re: st: RE: Stata list example - use of the margins command
Date
Fri, 09 Dec 2011 08:36:54 +0000
On Thu, Dec 08 2011, Peter Baade wrote:
> In the example below (with a reduced sample size) I generate the odds
> ratios using three methods, margins with nlcom, tabodds, and
> stratified logistic regression. While the ORs and standard errors are
> very similar, nlcom's confidence intervals seem to be incorrect.
nlcom seems to be generating CIs on the odds-ratio scale, i.e., OR +/-
z*SE, whereas the other methods CIs are on the log-odds-ratio scale
(back transformed), i.e. exp( log-OR +/- z*SE). The latter is better.
Brendan
--
Brendan Halpin, Department of Sociology, University of Limerick, Ireland
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