 |
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
Re: st: SAS versus Stata, Panel Study Logit models
At 11:05 PM 12/19/2007, Joseph Coveney wrote:
Not sure, but nothing jumps out of Stata's on-line help file about this.
Could you have hit upon what's behind the statment, "There is one difference
between SAS 6.12 TS Level 0060 (and Windows version 4.10.1650) and Stata
that cannot be explained: The results (beta, working correlation matrix, and
standard errors) of using PROC GENMOD do not match xtgee when panels are
unbalanced." in www.stata.com/support/faqs/stat/xtgeesas.html ?
It would be nice if I had, because then, after all these years, the
mystery would finally be solved. :) But in this case the panel is
balanced, so I suspect not.
Those FAQs are a little old. I wonder if SAS has tweaked its
behavior since they were written.
I'm not sure what SPSS means by "nonredundant parameters." Perhaps
there is some sort of adjustment reflecting correlations between
time-invariant variables like gender and race that do not change across time?
-------------------------------------------
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/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/