I am running a model that makes use of the Heaviside function. Does Dynare recognize such a function? If not, is there a way to program it into Dynare?
Thanks,
Adam
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by MichelJuillard » Sat Jun 17, 2006 1:27 pm
The Heaviside function
doesn't have a derivative at 0. Therefore, it can't be used in a stochastic model splved by local (first or second order) approximation.
In deterministic model, Dynare may be able to compute a traectory, but there is no guarantee....
In general, you can define any function in a separate *.m file and call it from inside a Dynare *.mod file. But, again, for non trivial functions, it is your responsibility that you can apply local approximation if you work with a stochastic model.
Kind regards
Michel
y = 1 for x > 0
y = 0 for x < 0
doesn't have a derivative at 0. Therefore, it can't be used in a stochastic model splved by local (first or second order) approximation.
In deterministic model, Dynare may be able to compute a traectory, but there is no guarantee....
In general, you can define any function in a separate *.m file and call it from inside a Dynare *.mod file. But, again, for non trivial functions, it is your responsibility that you can apply local approximation if you work with a stochastic model.
Kind regards
Michel
- MichelJuillard
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