Should I use differenced variables in ARDL model or their original form?

10 February 2023 1 5K Report

Hi dear scholars,

I am running ARDL model, some of my variables are stationary at level and the others at first difference. Should I include all the variables into regression in differenced form or in their original form?

Thanks in advance

Gioacchino de Candia

Any "transformation" of the variable causes a loss of information of the same, it is well known.

It all depends on how much you are willing to "pay" in terms of information loss.

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