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: xtregar in STATA vs. proc mixed in SAS


From   Stas Kolenikov <skolenik@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: xtregar in STATA vs. proc mixed in SAS
Date   Thu, 18 Mar 2010 15:37:26 -0500

No, you shouldn't. Stata does not have REML. And I doubt SAS has fixed
effects, as PROC MIXED is a biostat rather than an econometric
procedure.

On Thu, Mar 18, 2010 at 2:52 PM, Ma, Yu-Luen <yma@ilstu.edu> wrote:
> I estimated fixed effect models with AR(1) error strcture using both
> STATA and SAS but received significantly different results. Below are
> the programs that I used in each:
>
> STATA:
> tsset id time
> xtregar y x1 x2, fe
>
> SAS:
> Proc mixed method=reml data=xxx;
> class id time;
> model y = id x1 x2 /s;
> repeated/type=ar(1) subject=id ;
>
> Shouldn't I expect similar (if not identical) results from both
> software? Am I missing something? Thanks.



-- 
Stas Kolenikov, also found at http://stas.kolenikov.name
Small print: I use this email account for mailing lists only.
*
*   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