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st: Interpreting coefficients in GLM


From   Jung-eun Lee <[email protected]>
To   "[email protected]" <[email protected]>
Subject   st: Interpreting coefficients in GLM
Date   Tue, 6 Dec 2011 11:54:08 -0800 (PST)

Hello stata users,
I am estimating a GLM by using the following options: family(nbinomial) link(log) robust
How do I interpret the coefficients I get?

I used to employ negative binomial regression (nbreg) and interpreted coefficients in terms of percentages (after exponentiating them)
and I am wondering if I can do the same thing in the glm.
For instance, if I get .80 after exponentiating a coefficient, can I can X reduces Y by 20%?

Or, I can get "risk ratios" when I type "eform" with the glm command. What is the typical way of interpreting risk ratios?
If I get a risk ratio of .20, what is the relationship between X and Y? I am not familiar with this type of ratio.

I am sorry if this is a dumb question but I am really desperate for some help. 

I will greatly appreciate your input!

J

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