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I am running a model which has a mix of pooled data (dependent and one independent variables) and time series (two independent variables). I would like to use pooled data analysis instead of running a time series on each cross sectional unit/country. Is that allowed?

The zero values on the table are interpreted as having no response to the shock.
Yes, the first column refers to the lag period.

If I decide to use GENERALIZED impulse reponse, shouldn't I also use generalized variance decomposition (VDC)? If so, what commands should i use in EVIEWS to do the latter (VDC)?

I have two questions : (1) How do you decide in whether to use generalized or orthogonalized impulse responses ...based on paper by Pesaran & Shin (1998) ? I have seen work here people have tested first for "non-diagonal error variance matrix" but I don't see any tests like that in EVI...