Re: st: RE: Stata equivalent of SAS "Proc Traj"?

[David Bell <dcbell@iupui.edu>]

***
When I took Nagin's Developmental Trajectory workshop, I asked Jones  
to convert the program for Stata.  He did not show the requisite  
enthusiasm for redoing something he had already done for SAS.

I would be extremely enthusiastic if someone would take up the task  
for Stata.

Dave
====================================
David C. Bell
Professor of Sociology
Indiana University Purdue University Indianapolis (IUPUI)
(317) 278-1336
====================================




On Feb 13, 2009, at 11:49 AM, John Hoffmann wrote:

> I don't think an equivalent Stata procedure has been written,  
> although I could be wrong. Jones, one of the developers of Proc  
> Traj, has a website that might be useful (http://www.andrew.cmu.edu/user/bjones/index.htm 
> ). Also, given that the procedure is implemented as a SAS macro, it  
> shouldn't be too hard to write equivalent code for Stata.
>
> JH
>
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu 
> ] On Behalf Of Ariel Linden
> Sent: Thursday, February 12, 2009 8:37 PM
> To: statalist@hsphsun2.harvard.edu
> Subject: st: Stata equivalent of SAS "Proc Traj"?
>
> Hi all,
>
> There is a user-written program for SAS called "Proc Traj" which  
> uses a
> semi-parametric approach to categorize individuals into groups based  
> on
> their longitudinal trajectories.
>
> Is there similar procedure for us Stata folk?
>
> Here are the references:
>
> Jones, B. L., & Nagin, D. S. (2007). Advances in group-based  
> trajectory
> modeling and an SAS procedure for estimating them. Sociological  
> Methods &
> Research, 35, 542-571.
>
> Jones, B., Nagin, D. S., & Roeder, K. (2001). A SAS procedure based on
> mixture models for estimating developmental trajectories. Sociological
> Research and Methods, 29, 374-393.
>
> Thanks!
>
> Ariel
>
>
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