So our econometrics professor gave us the following Eviews outputs. enter image description here

enter image description here

First, it asked if it was the right decision to differentiate twice, which, according to what I interpret from the Eviews display, would be considered over differentiation.

But then we were asked to identify what was the ARIMA process generating the original series (RENTA, the non-stationary one).

From what I see, the model obtained for the second difference (second picture) D(RENTA,2) would be something like:

enter image description here

But I'm stuck there. I'm not sure if I'm interpreting the output correctly, so I don't know how to get from that expression to the original model. Any help will be very appreciated. Thanks in advance and kind regards.


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