[EMAIL PROTECTED] wrote:
I have a question about the levels of measurement in a multi-level regression model. The sampling frame is a representative cross section of students throughout the United States at each grade level. The three selection stages are: (1) geographic areas or primary sampling units (PSUs), (2) schools within PSUs, and (3) students within sampled schools.
As for my model, I have an individual level measure of alcohol consumption which is ordinal. I also have a school level measure of alcohol consumption, which is an aggregate of the individuals within a school--also ordinal. Then I have a Primary Sampling Unit variable on a scale from 1 to 72. This third level measure is the one I am confused about. It is not an ordinal measure, it is a nominal measure. How do I handle that in the regression? It is unreasonable to dummy code this variable.
Your help will be much appreciated.
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