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st: IV regression for multiple (more than 2) category endogenous variable


From   Rajan Panta <rajan.panta@anu.edu.au>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: IV regression for multiple (more than 2) category endogenous variable
Date   Mon, 10 Jun 2013 09:36:32 +0000

Dear Statalist users,
I want to run the following equation
y= a+b*x1+c*x2+e,
Where x1 is a categorical variable with 4 categories and x2 is a set of controls. X1 is endogeneous. I want to see the effects of different categories of x1 on y and to find if the effects are different according to the categories. I would appreciate if you could suggest me on the following question:
Which command do I need to use for the regression with categorical endogenous explanatory variable with 4 categories (treatreg only allows for binary dummy) and how many minimum IVs do I need? How can I interpret the coefficients?

Thanking you.

Regards,
Rajan.

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