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Re: st: NBREG for ordinal scales

From   Richard Williams <>
Subject   Re: st: NBREG for ordinal scales
Date   Mon, 09 Oct 2006 22:45:26 -0500

Is the outcome a 5-item ordinal scale, or is it a composite scale from ordinal items, i.e. several ordinal variables added together? If the former, why not just use an ordinal method? Also, it might help if you said how the dependent variable was worded. Just from what you have said, it would make me nervous to use count methods - it could be that a lot of people have done it wrong!

At 09:29 PM 10/9/2006, Matthew C. Johnson wrote:

Using the svy program in Stata 9.1, I have a dependent variable that is
highly skewed, with a large number of zeros. I think negative binomial
regression is appropriate for my analyses; however, the variable is not a
count or rate. It is merely a five-item ordinal scale. There are several
published articles using the same data set, with identical (or nearly
identical) dependent variables. However, they do not cite a source
justifying the use of regression techniques for count data when the data
is a composite scale from ordinal items. Is there a rule on this that I
have not found in my literature searches? Any help is appreciated
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