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st: Re: Quadratic Instrumental Variables

From   Mojgan Stegl <>
Subject   st: Re: Quadratic Instrumental Variables
Date   Mon, 02 Jan 2012 16:27:44 +0100

Dear all,

Is it possible to use quadratic instrumental variables on Stata using
 ivregress command?

fertility = a0 +a1 x education + a2 x ...+ u

education is endogenous so i will use distance to Tehran and square distance to Tehran as instruments. The reduced form equation:

education = b0 + b1x distance to Tehran + b2 x (distance to Tehran)^2

Best wishes


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