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st: 3SLS simultaneous equation goodness of fit test


From   alfredo jimenez palmero <alfredojimenezpalmero@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: 3SLS simultaneous equation goodness of fit test
Date   Mon, 26 Nov 2012 23:16:14 +0000

Dear Stata users,

I am planning to use a 3SLS simultaneous equation model, and I have read that R-squared is not a good indicator here. What kind of goodness of fit test can I use? In my preliminary models, I see I get a Chi2 coefficient, what is the test actually measuring here? what is the null hypothesis and, therefore, do I need a significant or not significant coefficient to prove that the model is good?
Thanks in advance!!
Alfredo 		 	   		  
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