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st: exponential smoothing
From
Schöler, Lisa <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: exponential smoothing
Date
Mon, 16 Aug 2010 14:00:55 +0000
Hi Statalist,
I want to do exponential smoothing for sales with Stata. I used the command
.tssmooth dexponential sales = ussalesdols000, forecast(1)
Sometimes I get negative out of sample forecasts which can't be true for sales. Is there a way to include a constraint so the out of sample forecasts will not get negative?
Best
Lisa
Lisa Schöler
Professur für BWL, insb. Electronic Commerce
Goethe-Universität Frankfurt
Grüneburgplatz 1
60629 Frankfurt a.M.
Phone: ++49 69 798 34632
Fax: ++49 69 798 35001
Email: [email protected]
URL: www.ecommerce.wiwi.uni-frankfurt.de
_________________________________
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http://www.goethe-master.de
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