% Adds a simple shock to the forecast scenario plan
%
% INPUTS
% o plan [structure] A structure describing the different shocks and the implied variables, the date of the shocks and the path of the shock (forecast scenario).
% The plan structure is created by the functions init_plan, basic_plan and flip_plan
% o exogenous [string] A string containing the name of the exognous shock.
% o expectation_type [string] A string indicating the type of expectation: 'surprise' for an unexpected shock, and 'perfect_foresight' for a perfectly anticpated shock.
% o date [dates] The period of the shock
% o value [array of double] A vector of double containing the values of the exogenous variable
%
%
% OUTPUTS
% plan [structure] Returns a structure containing the updated forecast scenario.
error(['in basic_plan the third argument should be a string containing the simulation type (''perfect_foresight'' or ''surprise'')']);
end
exogenous=strtrim(exogenous);
ix=find(strcmp(exogenous,plan.exo_names));
ifisempty(ix)
error(['in basic_plan the second argument 'exogenous' is not an exogenous variable']);
end
sdate=length(date);
ifsdate>1
ifdate(1)<plan.date(1)||date(end)>plan.date(end)
error(['in basic_plan the fourth argument (date='date') must lay inside the plan.date 'plan.date]);
end
else
ifdate<plan.date(1)||date>plan.date(end)
error(['in basic_plan the fourth argument (date='date') must lay iside the plan.date 'plan.date]);
end
end
iflength(date)~=length(value)
error(['in basic_plan the number of dates ('int2str(length(date))') is not equal to the numbers of shock ('int2str(length(value))') for exogenous variable 'exogenous]);
warning(['Impossible case: 'plan.exo_names{plan.options_cond_fcst_.controlled_varexo(common_var)}' is used both as a shock and as an endogenous variable to control the path of 'plan.endo_names{plan.constrained_vars_(common_var)}' at the dates 'the_dates]);