139 lines
5.2 KiB
Matlab
139 lines
5.2 KiB
Matlab
function [nvar,vartan,CovarFileNumber] = dsge_simulated_theoretical_covariance(SampleSize,M_,options_,oo_,type)
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% function [nvar,vartan,CovarFileNumber] = dsge_simulated_theoretical_covariance(SampleSize,M_,options_,oo_,type)
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% This function computes the posterior or prior distribution of the endogenous
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% variables second order moments.
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%
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% INPUTS
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% SampleSize [integer] scalar, number of simulations.
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% M_ [structure] Dynare structure describing the model.
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% options_ [structure] Dynare structure defining global options.
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% oo_ [structure] Dynare structure where the results are saved.
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% type [string] 'prior' or 'posterior'
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%
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%
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% OUTPUTS
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% nvar [integer] nvar is the number of stationary variables.
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% vartan [char] array of characters (with nvar rows).
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% CovarFileNumber [integer] scalar, number of prior or posterior data files (for covariance).
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% Copyright (C) 2007-2017 Dynare Team
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%
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% This file is part of Dynare.
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%
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% Dynare is free software: you can redistribute it and/or modify
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% it under the terms of the GNU General Public License as published by
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% the Free Software Foundation, either version 3 of the License, or
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% (at your option) any later version.
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%
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% Dynare is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU General Public License
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% along with Dynare. If not, see <http://www.gnu.org/licenses/>.
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nodecomposition = 1;
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% Get informations about the _posterior_draws files.
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if strcmpi(type,'posterior')
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DrawsFiles = dir([M_.dname '/metropolis/' M_.fname '_' type '_draws*' ]);
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posterior = 1;
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elseif strcmpi(type,'prior')
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DrawsFiles = dir([M_.dname '/prior/draws/' type '_draws*' ]);
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CheckPath('prior/moments',M_.dname);
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posterior = 0;
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else
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disp('dsge_simulated_theoretical_covariance:: Unknown type!')
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error();
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end
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NumberOfDrawsFiles = length(DrawsFiles);
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%delete old stale files before creating new ones
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if posterior
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delete_stale_file([M_.dname '/metropolis/' M_.fname '_Posterior2ndOrderMoments*'])
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else
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delete_stale_file([M_.dname '/prior/moments/' M_.fname '_Prior2ndOrderMoments*'])
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end
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% Set varlist (vartan)
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if ~posterior
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if isfield(options_,'varlist')
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temp = options_.varlist;
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end
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options_.varlist = options_.prior_analysis_endo_var_list;
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end
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[ivar,vartan] = get_variables_list(options_,M_);
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if ~posterior
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if exist('temp','var')
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options_.varlist = temp;
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end
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end
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nvar = length(ivar);
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% Set the size of the auto-correlation function to zero.
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nar = options_.ar;
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options_.ar = 0;
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% Number of lines in posterior data files.
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MaXNumberOfCovarLines = ceil(options_.MaxNumberOfBytes/(nvar*(nvar+1)/2)/8);
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if SampleSize<=MaXNumberOfCovarLines
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Covariance_matrix = zeros(SampleSize,nvar*(nvar+1)/2);
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NumberOfCovarFiles = 1;
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else
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Covariance_matrix = zeros(MaXNumberOfCovarLines,nvar*(nvar+1)/2);
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NumberOfLinesInTheLastCovarFile = mod(SampleSize,MaXNumberOfCovarLines);
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NumberOfCovarFiles = ceil(SampleSize/MaXNumberOfCovarLines);
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end
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NumberOfCovarLines = rows(Covariance_matrix);
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CovarFileNumber = 1;
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% Compute 2nd order moments and save them in *_[Posterior, Prior]2ndOrderMoments* files
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linea = 0;
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for file = 1:NumberOfDrawsFiles
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if posterior
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load([M_.dname '/metropolis/' DrawsFiles(file).name ],'pdraws');
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else
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load([M_.dname '/prior/draws/' DrawsFiles(file).name ],'pdraws');
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end
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NumberOfDraws = rows(pdraws);
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isdrsaved = columns(pdraws)-1;
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for linee = 1:NumberOfDraws
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linea = linea+1;
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if isdrsaved
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M_=set_parameters_locally(M_,pdraws{linee,1});% Needed to update the covariance matrix of the state innovations.
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dr = pdraws{linee,2};
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else
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M_=set_parameters_locally(M_,pdraws{linee,1});
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[dr,info,M_,options_,oo_] = resol(0,M_,options_,oo_);
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end
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tmp = th_autocovariances(dr,ivar,M_,options_,nodecomposition);
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for i=1:nvar
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for j=i:nvar
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Covariance_matrix(linea,symmetric_matrix_index(i,j,nvar)) = tmp{1}(i,j);
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end
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end
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if linea == NumberOfCovarLines
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if posterior
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save([ M_.dname '/metropolis/' M_.fname '_Posterior2ndOrderMoments' int2str(CovarFileNumber) '.mat' ],'Covariance_matrix');
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else
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save([ M_.dname '/prior/moments/' M_.fname '_Prior2ndOrderMoments' int2str(CovarFileNumber) '.mat' ],'Covariance_matrix');
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end
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CovarFileNumber = CovarFileNumber + 1;
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linea = 0;
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test = CovarFileNumber-NumberOfCovarFiles;
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if ~test% Prepare the last round...
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Covariance_matrix = zeros(NumberOfLinesInTheLastCovarFile,nvar*(nvar+1)/2);
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NumberOfCovarLines = NumberOfLinesInTheLastCovarFile;
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elseif test<0
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Covariance_matrix = zeros(MaXNumberOfCovarLines,nvar*(nvar+1)/2);
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else
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clear('Covariance_matrix');
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end
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end
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end
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end
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options_.ar = nar; |