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: difficulty with aflogit command
From
Richard Williams <[email protected]>
To
[email protected]
Subject
Re: st: difficulty with aflogit command
Date
Sun, 29 May 2011 10:12:39 -0500
With user-written postestimation commands, you often need to run the
estimation command under version control. This is because ereturned
results can change across versions of Stata, and the post-estimation
command was written for an older format. Also, it may be that aflogit
doesn't like variable names that are more than 8 characters, which I
am guessing was Stata's limit way back when. The following code seems to work:
sysuse auto, clear
version 10: logit foreign mpg rep78
aflogit
clonevar displace = displacement
poisson price weight displace
aflogit
At 12:54 AM 5/29/2011, Ari Samaranayaka wrote:
Hi
I am having difficulty with the user-written command aflogit.
Although it is expected to work after unconditional logit or poisson
it does not work for me.
sysuse auto,clear
logit foreign mpg rep78
aflogit
this produce
Logistic regression Number of obs
= 69
LR chi2(2)
= 33.10
Prob > chi2 =
0.0000
Log likelihood = -25.851693 Pseudo R2 =
0.3903
------------------------------------------------------------------------------
foreign | Coef. Std. Err. z P>|z| [95%
Conf. Interval]
-------------+----------------------------------------------------------------
mpg | .1328672 .0735776 1.81 0.071 -.0113423
.2770767
rep78 | 1.73607 .4928761 3.52 0.000 .7700508
2.70209
_cons | -10.03775 2.407455 -4.17 0.000 -14.75628
-5.319226
------------------------------------------------------------------------------
.
. aflogit
Can only be used after unconditional logistic or poisson regression
last estimates not found
r(301);
Then I used the following.
poisson price weight displacement
aflogit
This produces
Poisson regression Number of obs
= 74
LR chi2(2) =
29652.15
Prob > chi2 =
0.0000
Log likelihood = -29162.101 Pseudo R2 =
0.3370
------------------------------------------------------------------------------
price | Coef. Std. Err. z P>|z| [95%
Conf. Interval]
-------------+----------------------------------------------------------------
weight | .0003235 4.52e-06 71.55 0.000 .0003147
.0003324
displacement | .0000446 .000037 1.20 0.228 -.000028
.0001172
_cons | 7.708671 .0081077 950.79 0.000 7.69278
7.724561
------------------------------------------------------------------------------
. aflogit
Population attributable fraction from poisson regression
Cross-sectional / cohort data (n=74)
Term Ref. A.F. s.e. [95% Conf. Int.]*
----------------------------------------------------------
weight 0 0.6355 11.9561 -3.03e+27 1.0000
ment not found
r(111);
Can someone help me.
I am using stata SE 11.2.
my version of aflogit is
c:\ado\plus\a\aflogit.ado
*! version 1.0.6 16 Sep 1997 STB-42 sbe21
Thank you
Ari
*
* 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/
-------------------------------------------
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/