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st: RE: exponential smoothing
From
"Nick Cox" <[email protected]>
To
<[email protected]>
Subject
st: RE: exponential smoothing
Date
Mon, 16 Aug 2010 18:58:17 +0100
Predicting the logarithm of sales and back-transforming is one possibility. Another is that your sales are fluctuating too erratically to be predictable by this method.
Nick
[email protected]
Schöler, Lisa
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?
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