## page was renamed from ShocksDecomposition
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= Shock decomposition =

A new function computes and displays shock decomposition according to the model for a given sample.

== Syntax ==

{{{
shock_decomposition;
}}}

This instruction must be given after an {{{estimation}}} statement.

Since Dynare 4.2, it is possible to select the parameter values used to compute the decomposition, with the {{{parameter_set}}} option:
{{{
shock_decomposition(parameter_set = prior_mode);
}}}
This option can take five values: {{{prior_mode}}}, {{{prior_mean}}}, {{{posterior_mean}}}, {{{posterior_mode}}}, {{{posterior_median}}}.


If this option has not been specified, then the parameter set is selected according to the following rules:
 * If only the posterior mode (or maximum likelihood) has been computed, the parameters are set to the corresponding values;
 * If Metropolis has been run (or {{{load_mh_file}}} option is used) the parameters are set to the posterior mean.

== To be added ==

 * A mechanism for grouping together different exogenous variables and giving them an appropriate label for the decomposition graph.
 * The ability to compute shock decomposition for calibrated models.