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Re: st: xtgee for skewed data

From   José Maria Pacheco de Souza <>
Subject   Re: st: xtgee for skewed data
Date   Thu, 25 Aug 2011 14:11:03 -0300

Em 25/08/2011 11:23, Austin Nichols escreveu:

Yes--see the third paragraph on page 5 of the presentation referenced
at the end of the blog post:


Dear Statalisters:
 If the interest is to run a linear regression  of a
continuous variable as the response, say level of beta carothen, and for
very small values the results are zero because the equipment can only show
values equal or greater than .04, the use of -tobit- can be an statistical
Let´s assume there is no money to buy a better device.
Best regards,
josé maria

Dear Austin and Nick:
thank you very much for the comments.
josé maria
Jose Maria Pacheco de Souza
Professor Titular (aposentado), Colaborador Senior
Departamento de Epidemiologia/Faculdade de Saude Publica, USP
Av. Dr. Arnaldo, 715
01246-904  -  S. Paulo/SP - Brasil
fones (11)3061-7747; (11)3768-8612
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