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st: Problem with grqreg

From   "Michael C. Morrison" <>
Subject   st: Problem with grqreg
Date   Mon, 22 Feb 2010 21:33:32 -0600

I'm having a problem with grqreg.

After running a quantile regression with:

sqreg pincp ageqtr retp schl_group semp sex wagp, q(.05 .10 .25 .50 .75 .90 .95)

I want to graph the coefficients of the quantile regression with grqreg with the following command:

    grqreg, ci ols

However, I receive the following error:

    postfile: variable ageqtr already exists

(Note that "ageqtr" is the first independent var in the quantile regression.)

All my variables have labels.

Any help would be greatly appreciated. I'm using Stata version 11, 64 bit, Windows 7.


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