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.
[email protected]
-----Original Message-----
From: TELHAJ Shqiponje [mailto:[email protected]]
Sent: Thursday, 13 May 2004 3:26 AM
To: [email protected]
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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