Partial concurrent adjustment → Fixed model

The Partial concurrent adjustment → Fixed model strategy means that the ARIMA model, outliers and other regression variables are not re-identified and the values of the associated coefficients are fixed. In particular, new outliers cannot be added to the model and neither calendar variables nor the outliers type can be changed. The transformation type remains unchanged.

The example below shows the initial model (left) and the results of the refreshment procedure with the Partial concurrent adjustment → Fixed model option (right). The ARIMA orders are not re-estimated and the associated coefficients are the same as before. The trading days variables and outliers are fixed too and no new regression effect is identified.

A Partial concurrent adjustment → fixed model revision policy results