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st: How to test whether coefficient change between two models significant


From   Bluesman Wood <[email protected]>
To   <[email protected]>
Subject   st: How to test whether coefficient change between two models significant
Date   Tue, 7 Jun 2011 10:01:25 +0000

Hi.
 
I have two linear regression models A and B:
 
A:
attribute = c + explanatory_var1
 
B:
attribute = c + explanatory_var1 + explanatory_var2
 
 
Given that I know both explanatory variables are significant, I would like to know a way of testing whether the regression coefficient for explanatory_var1 changes significantly when I add in explanatory_var2.
 
Does anyone know a test for this that I could perform in STATA?
 
Many thanks,
 
Sam. 		 	   		  
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