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: re: margeff/margins discrepancy
From
Richard Williams <[email protected]>
To
[email protected]
Subject
Re: st: re: margeff/margins discrepancy
Date
Sun, 25 Apr 2010 14:34:35 -0500
At 10:35 AM 4/25/2010, Kit Baum wrote:
<>
Joanne's problem arises because in the code for Bartus' margeff,
version 2.2.0 of 20 Aug 2009 (on SSC),
the line
>
> qui replace `touse'=1
>
> // Calculation of partial effects and standard errors
causes the information in the `touse' indicator, which points to the
selected cases (78/2246 in the example Joanne gave) to be lost.
Lower down, a calculation like
Good catch. I had noticed that margeff and margins tended to give
results that were close but not quite the same. I attributed that to
differences in their approaches. But, once you get the sample
selection right, it appears the two give identical results.
-------------------------------------------
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/statalist/faq
* http://www.ats.ucla.edu/stat/stata/