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| Regressors | 1 parameter model | 2 parameters model | 3parameters model |
| F(t−1) | 27∶1 | 46∶1 | – |
| U(t−1) | 25∶5 | 45∶2 | – |
| F(t−1) and U(t−1) |
U(t−1)+(1−
)F(t−1)
|
47∶1 | 47∶1 |
The models correspond to the models of Table 1.
