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st: How to estimate the sum of two estimators


From   =?ks_c_5601-1987?B?sejH9sG+?= <kim@keri.org>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: How to estimate the sum of two estimators
Date   Wed, 11 Aug 2004 01:16:16 +0900

Dear all, 




I would like to ask you how to estimate the sum of two estimators. 

I have examined two equations (supply curve and demand curve) and used reg3 for a just simple (OLS) SEM model as follows 




Q = a1 + a2 * P +... + u 

P = b1 + b2 * Q + .... + b3 * X +b4 * X * dummy + v 




Actually, I want to know the estimator  value and t-value of "b3 + b4" ... I want to know how to estimate b3+b4 (the sum of two estimators). 

How can I get this? Is there any commend for my question on STATA? Or is there any other methord for estimate the sum of two estimators? 

Thank you in advance 




Kind regards 




Kim 

 

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