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st: RE: Dependent variable is a proportion


From   "Moran, John (NWAHS)" <John.Moran@nwahs.sa.gov.au>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Dependent variable is a proportion
Date   Thu, 13 May 2004 10:34:34 +0930

A good review of this problem (the authors used various packages, including
Stata 7) is given in: R. Kieschnick and B. D. McCullough. Regression
analysis of variates observed on (0,1): percentages, proportions and
fractions. Statistical modelling 3:193-213, 2003.

john.moran@nwahs.sa.gov.au


-----Original Message-----
From: TELHAJ Shqiponje [mailto:S.Telhaj@staffs.ac.uk] 
Sent: Thursday, 13 May 2004 3:26 AM
To: statalist@hsphsun2.harvard.edu
Subject: st: Dependent variable is a proportion

Dear statalisters,

The dependent variable I have is a proportion (percentage of 16 year
olds enrolled in a particular subject) which is between 0 and 86
percent. I am not sure about the linear form. My dependent variable is 0
only in 3,980 cases out of 112,412 sample obs. Here a zero is a
structural one, because the school does not offer history (which is
choice subject). 

Would somebody suggest to me whether it would be better to perform a
logit transformation, or estimate -glm- with family(gaussian) and
link(logit). Any suggestion would be greatly appreciated!

Thank you in advance!

Shqiponja

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