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st: quantile regression graph

From   "Carlo Amenta" <>
To   <>
Subject   st: quantile regression graph
Date   Wed, 3 Jun 2009 13:59:08 +0200

Dear statalisters,

I am trying to use STATA module grqreg, but I can't. 
After a sqreg regression in which the first independent variable is X, the 
program always gives me the following error message:

 . grqreg, cons ci ols olsci
postfile: variable X already exists

I have tried to change label to the variable X (or leave it without label),
I have changed the order of regressors but nothing happened. Any idea on the

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