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Debt-to-GDP ratio - predetermined variable

PostPosted: Tue Aug 02, 2016 2:02 pm
by ifa
I'd appreciate if someone could help me with a simple doubt. Government debt, B(t) is a predetermined variable. Accordingly, I have to write this variable with a one period lag in the file.mod, as B(t-1).

Nevertheless, if b(t) is the debt-to-GDP ratio, defined as b(t)= B(t)/Y(t-1), should I write b(t-1) in the dynare code or b(t)?

Thank you

Re: Debt-to-GDP ratio - predetermined variable

PostPosted: Tue Aug 02, 2016 2:05 pm
by jpfeifer
If it's the share relative to past GDP as you write, then it is still predetermined, because past output cannot be changed anymore at time t. In this case it should be b(-1).

Re: Debt-to-GDP ratio - predetermined variable

PostPosted: Tue Aug 02, 2016 2:08 pm
by ifa
jpfeifer wrote:If it's the share relative to past GDP as you write, then it is still predetermined, because past output cannot be changed anymore at time t. In this case it should be b(-1).


Thank you very much jpfeifer for your quick response! :)