Re: st: conversion for sas "proc mixed" command

[Buzz Burhans <wsb2@cornell.edu>]

Kathleen,

There is no completely equivalent command in Stata for SAS Proc Mixed. Some 
of the xt- commands implement limited features of Proc mixed. The closest 
Stata command is -gllamm- which is not part of official Stata and can be 
obtained from SSC:

findit gllamm

or SSC install gllamm

It is a great program, but lacks some capabilities of Proc Mixed such as 
modeling covariance structures which may be a limitation in some cases such 
as repeated measures data.  It does have a  robust and a cluster option 
which can be a workaround. there is also a gllamm website (GLLAMM.com 
maybe? I'm sure you coould turn it up with a Google search) that had a copy 
of a gllamm manual which may also be available from the SSC site, I'm not sure.

The author also has a new text at the Stata bookstore that includes 
apparently includes some discussion of using -gllamm- :
 A Handbook of Statistical Analyses Using Stata, 3d ed

Buzz Burhans



At 12:02 PM 1/26/2004 -0500, you wrote:

> Hello, I'm a basic STATA user and have little to no knowledge about SAS.  If
> there is anyone familiar with both, can you direct me to the commands that
> would be similar to the SAS "proc mixed" command?  Thank you for any help.
>
> K
> *
> *   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/
Buzz Burhans
wsb2@cornell.edu


*
*   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/