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RE: st: xttobit with multiple upper limits


From   "Mentzakis, Emmanouil" <e.mentzakis@abdn.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: xttobit with multiple upper limits
Date   Fri, 1 Feb 2008 10:39:44 -0000

I would imagine that you cannot have many ul variables. But you could have one variable with different values for each group.

e.g.

Treat_group     UL
-----------------------------
 1                  ul1
 1                  ul1
 2                  ul2
 2                  ul2
 2                  ul2
 3                  ul3
 3                  ul3
 3                  ul3
 4                  ul4
 4                  ul4 

 

Cheers

Manos


________________________________

From: owner-statalist@hsphsun2.harvard.edu on behalf of Andrea Kutinova
Sent: Fri 2/1/2008 4:06 AM
To: statalist@hsphsun2.harvard.edu
Subject: RE: st: xttobit with multiple upper limits



Thank you Scott! Can I use a list of variables such as ul(tr1 tr2
tr3...), where tr1 is a binary variable indicating membership in
treatment group 1, tr2 a binary variable indicating membership in
treatment group 2, etc.? What I want to achieve is: if tr1 = 1 then use
ul(0), if tr2 = 1 then use ul(10) etc.

Your help is much appreciated,
Andrea


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Scott
Merryman
Sent: Friday, 1 February 2008 4:28 p.m.
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: xttobit with multiple upper limits

In -xttobit- the censoring limit can be a variable.

Scott


On Jan 31, 2008 9:13 PM, Andrea Kutinova
<andrea.kutinova@canterbury.ac.nz> wrote:
> Dear Stata users,
>
> I'm estimating an xttobit model with multiple treatment groups and the
> dependent variable has a different upper bound for each treatment
group.
> Is there a way to allow for different ul() by treatment group
> membership?
>
> I'd appreciate your suggestions very much!
> Andrea
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