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IRF for two exogenous shock?

PostPosted: Fri Feb 14, 2014 1:32 pm
by Shreekar
Hi,

I have two stupid (most likely) questions.

1) I want to analyze simultaneously two exogenous shocks in a model (eg. two different productivity shocks) but I get two separate Impulse response functions corresponding to each shock respectively. How can I have a joint IRF as the result of the two exogenous shocks in the model?

2) I want to give an exogenous positive shock to the model but it should, at the same time, give a negative shock to another exogenous variable. The later shock is in a proportion to the first shock. In other words, a shock should also generates another exogenous shock in the model.

Best,

Shreekar

Re: IRF for two exogenous shock?

PostPosted: Fri Feb 14, 2014 2:14 pm
by jpfeifer
See http://www.dynare.org/phpBB3/viewtopic.php?f=1&t=2515

For a negative shock, just put a (-1) before the shock in the model equations.