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st: re: how to explain the results of ivendog after -ivreg2-?


From   Kit Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: re: how to explain the results of ivendog after -ivreg2-?
Date   Tue, 4 Aug 2009 14:27:38 -0400

<>
Rose said
However, I still need to decide which one or both are endogeous, which is a previous step of regression later. Only deciding the endogeneity first can I decide the equation ultimately. Could you please give me any suggestion ?

The results you present show that there is definitive evidence that the equation should not be estimated by OLS, and that instrumental variables techniques are required to achieve consistency. It is safest to assume that both should be considered endogenous, as when both are excluded you have problems.
Kit

Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
   An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html



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