IRF for two exogenous shock?


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.



See [3 exogenous shocks at a time)

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