2012-04-27 15:57:58 +02:00
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function [g,grad,hess,flag] = moment_function(xparams,sample_moments,dataset,options,parallel)
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2010-02-17 16:53:04 +01:00
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% Evaluates the moment function of the Simulated Moments Method (discrepancy between sample and
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% ).
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%
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% INPUTS:
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2017-05-16 15:10:20 +02:00
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% xparams [double] p*1 vector of estimated parameters.
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2010-02-17 16:53:04 +01:00
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% sample_moments [double] n*1 vector of sample moments (n>=p).
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% options [ ] Structure defining options for SMM.
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% parallel [ ] Structure defining the parallel mode settings (optional).
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%
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2017-05-16 15:10:20 +02:00
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% OUTPUTS:
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2010-02-17 16:53:04 +01:00
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% g [double] n*1 vector, the gap between simulated and sample moments.
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% flag [intger] empty matrix.
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%
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% SPECIAL REQUIREMENTS
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% The user has to provide a file where the moment conditions are defined.
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2017-05-16 14:11:15 +02:00
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% Copyright (C) 2010-2017 Dynare Team
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2010-02-17 16:53:04 +01:00
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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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2017-05-16 15:10:20 +02:00
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% along with Dynare. If not, see <http://www.gnu.org/licenses/>.
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2010-02-17 16:53:04 +01:00
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global M_ options_
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persistent mainStream mainState
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persistent priorObjectiveValue
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flag = 1;
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2012-04-27 15:57:58 +02:00
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grad=[];
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hess=[];
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2010-02-17 16:53:04 +01:00
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if nargin<5
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if isempty(mainStream)
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2012-04-27 15:57:58 +02:00
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mainStream = RandStream.getDefaultStream;
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2010-02-17 16:53:04 +01:00
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mainState = mainStream.State;
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else
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mainStream.State = mainState;
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end
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end
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penalty = 0;
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for i=1:options.estimated_parameters.nb
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if ~isnan(options.estimated_parameters.upper_bound(i)) && xparams(i)>options.estimated_parameters.upper_bound(i)
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penalty = penalty + (xparams(i)-options.estimated_parameters.upper_bound(i))^2;
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end
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if ~isnan(options.estimated_parameters.lower_bound(i)) && xparams(i)<options.estimated_parameters.lower_bound(i)
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penalty = penalty + (xparams(i)-options.estimated_parameters.lower_bound(i))^2;
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end
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end
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if penalty>0
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flag = 0;
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2017-05-16 12:42:01 +02:00
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return
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2010-02-17 16:53:04 +01:00
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end
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save('estimated_parameters.mat','xparams');
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% Check for local determinacy of the deterministic steady state.
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noprint = options_.noprint; options_.noprint = 1;
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[local_determinacy_and_stability,info] = check; options_.noprint = noprint;
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if ~local_determinacy_and_stability
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flag = 0;
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return
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end
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simulated_moments = zeros(size(sample_moments));
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% Just to be sure that things don't mess up with persistent variables...
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clear perfect_foresight_simulation;
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if nargin<5
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for s = 1:options.number_of_simulated_sample
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time_series = extended_path([],options.simulated_sample_size,1);
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2010-02-17 18:27:20 +01:00
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data = time_series(dataset.observed_variables_idx,options.burn_in_periods+1:options.simulated_sample_size);
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2010-02-17 16:53:04 +01:00
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eval(['tmp = ' options.moments_file_name '(data);'])
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simulated_moments = simulated_moments + tmp;
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simulated_moments = simulated_moments / options.number_of_simulated_sample;
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end
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else% parallel mode.
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if ~isunix
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error('The parallel version of SMM estimation is not implemented for non unix platforms!')
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end
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job_number = 1;% Remark. First job is for the master.
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[Junk,hostname] = unix('hostname --fqdn');
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hostname = deblank(hostname);
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for i=1:length(parallel)
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machine = deblank(parallel(i).machine);
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if ~strcmpi(hostname,machine)
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% For the slaves on a remote computer.
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unix(['scp estimated_parameters.mat ' , parallel(i).login , '@' , machine , ':' parallel(i).folder ' > /dev/null']);
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else
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if ~strcmpi(pwd,parallel(i).folder)
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% For the slaves on this computer but not in the same directory as the master.
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unix(['cp estimated_parameters.mat ' , parallel(i).folder]);
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end
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end
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for j=1:parallel(i).number_of_jobs
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2017-05-16 15:10:20 +02:00
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if (strcmpi(hostname,machine) && j>1) || ~strcmpi(hostname,machine)
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2010-02-17 16:53:04 +01:00
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job_number = job_number + 1;
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unix(['ssh -A ' parallel(i).login '@' machine ' ./call_matlab_session.sh job' int2str(job_number) '.m &']);
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end
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end
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end
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% Finally the Master do its job
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tStartMasterJob = clock;
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eval('job1;')
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tElapsedMasterJob = etime(clock, tStartMasterJob);
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TimeLimit = tElapsedMasterJob*1.2;
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2017-05-16 15:10:20 +02:00
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% Master waits for the slaves' output...
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2010-02-17 16:53:04 +01:00
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tStart = clock;
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tElapsed = 0;
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while tElapsed<TimeLimit
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if ( length(dir('./intermediary_results_from_master_and_slaves/simulated_moments_slave_*.dat'))==job_number )
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break
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end
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tElapsed = etime(clock, tStart);
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end
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try
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tmp = zeros(length(sample_moments),1);
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for i=1:job_number
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simulated_moments = load(['./intermediary_results_from_master_and_slaves/simulated_moments_slave_' int2str(i) '.dat'],'-ascii');
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tmp = tmp + simulated_moments;
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end
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2017-05-16 15:10:20 +02:00
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simulated_moments = tmp / job_number;
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2010-02-17 16:53:04 +01:00
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catch
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flag = 0;
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return
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end
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end
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g = simulated_moments-sample_moments;
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