Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: missing factor variables in table of estimates


From   brendan.halpin@ul.ie (Brendan Halpin)
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: missing factor variables in table of estimates
Date   Sat, 03 Mar 2012 15:24:04 +0000

I'm having a related difficulty as the following code demonstrates:

   use http://www.stata-press.com/data/lf2/couart2.dta, clear
   poisson art i.fem phd
   est store PRM
   nbreg art i.fem phd
   est store NBRM
   est table PRM NBRM

This generates the following, where the nbreg model can't see the 1.fem
parameter, but the poisson model can. 

----------------------------------------
    Variable |    PRM          NBRM     
-------------+--------------------------
art          |
         fem |
          0  |     (base)      (empty)  
          1  | -.24280475      (empty)  
             |
         phd |  .08183624    .08529713  
       _cons |  .37346521    .36445355  
-------------+--------------------------
lnalpha      |
       _cons |              -.57963612  
----------------------------------------


The problem doesn't arise if I don't use factor notation.

I note that poisson and nbreg handle reporting parameter estimates in
different ways; perhaps this is a consequence of that.

Brendan
-- 
Brendan Halpin,   Department of Sociology,   University of Limerick,   Ireland
Tel: w +353-61-213147  f +353-61-202569  h +353-61-338562;  Room F1-009 x 3147
mailto:brendan.halpin@ul.ie    ULSociology on Facebook: http://on.fb.me/fjIK9t
http://teaching.sociology.ul.ie/bhalpin/wordpress         twitter:@ULSociology
*
*   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/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index