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st: xtlogit with a fractional response

From   Garry Anderson <>
Subject   st: xtlogit with a fractional response
Date   Wed, 27 Feb 2008 17:59:49 +1100

Dear Statalist,

I was attempting to analyse a fractional response with -xtlogit propn x1
,re i(id)-. However, it seems that all nonmissing values other than zero
are regarded as a positive outcome. This is not the situation with
-glm proportion xvars ,fam(bin) link(logit) robust-

This is mentioned in the FAQ 'How do you estimate a model when the
dependent variable is a proportion?' at

'glm has since been enhanced specifically to deal with fractional
response data.'

I was wondering if there is a way that xtlogit can be used with
fractional response panel data? 
(Other options include glm and the cluster robust variance, or xtgee.)

Best wishes, Garry
Garry Anderson
School of Veterinary Science
University of Melbourne
250 Princes Highway    Ph  03 9731 2221
WERRIBEE    3030       Fax  03 9731 2388

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