On Sun, 4 Jul 2004, Ajay Shah wrote:
> > It might clarify your thinking to note that a seasonal ARIMA model
> > is just an ``ordinary'' ARIMA model with some coefficients
> > constrained to be 0 in an efficient way. E.g. a seasonal AR(1) s =
> > 4 model is the same as an ordinary (nonseasonal) A
> It might clarify your thinking to note that a seasonal ARIMA model
> is just an ``ordinary'' ARIMA model with some coefficients
> constrained to be 0 in an efficient way. E.g. a seasonal AR(1) s =
> 4 model is the same as an ordinary (nonseasonal) AR(4) model with
> coefficients theta_1, theta_
