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From: Adrienne on 4 Jun 2010 16:12
What does a 'B' represent after the coefficient estimate in the proc
glm output?

Thanks.
From: Paige Miller on 4 Jun 2010 16:25
On Jun 4, 4:12 pm, Adrienne <adrienne.ing...(a)gmail.com> wrote:
> What does a 'B' represent after the coefficient estimate in the proc
> glm output?

SAS parameterizes categorical variables by forcing the coefficient of
the last level alphabetically to be zero. This means that the
coefficient estimate itself is not unqiue (or biased, hence to B), but
linear combinations of the coefficients will be unique and unbiased.
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