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st: option error for rollreg function


From   Benjamin Volland <volland@econ.mpg.de>
To   statalist@hsphsun2.harvard.edu
Subject   st: option error for rollreg function
Date   Mon, 29 Jun 2009 15:16:16 +0200

Hi statalists,

I've tried to run the rollreg function on some simple data of mine and always got a

option / required
r(198);

error message.
Being slightly frustrated after a little while I tried the illustration provided by Baum (2006) and stumbled upon the very same problem, i.e.

. webuse wpi1, clear
. g t2 = t ^2
. rollreg D.wpi t t2, move(24) stub(wpiM) graph(summary)
option / required
r(198);

Does anyone have a clue what (probably very obvious lapse) I am missing here? Thanks so much.

Ben
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