Full_Name: david stoffer
Version: 1.9.0
OS: win xp pro
Submission from: (NULL) (67.165.78.88)


arima() doesn't fit the model correctly if there is differencing and a constant
is still needed.  also, the description saying that it's not necessary to ever
fit a constant is incorrect.

if you fit a pure AR using arima(), it tells you it's giving you the intercept
term, but it's actually reporting the estimate of the mean.

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