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Re: st: arima output differs significantly from SPSS & SAS
From
Scott Merryman <[email protected]>
To
[email protected]
Subject
Re: st: arima output differs significantly from SPSS & SAS
Date
Wed, 5 Dec 2012 14:49:39 -0600
On Tue, Dec 4, 2012 at 3:14 PM, Arash Mahdian <[email protected]> wrote:
> How would I get the similar result in Stata?
-arima- does not have an option for conditional least squares.
Note:
“Generally, the conditional and unconditional least
squares estimators serve as satisfactory approximations
to the maximum likelihood estimator for large sample
sizes. However, simulation evidence suggests a
preference for the maximum likelihood estimator for
small or moderate sample sizes, especially if the moving
average operator has a root close to the boundary of the
invertibility region.” (page 237)
Box, G. E. P., Jenkins, G. M., and Reinsel, G. C. (1994). Time Series
Analysis, Forecasting and Control
Scott
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