98 lines
3.3 KiB
Matlab
98 lines
3.3 KiB
Matlab
function oo1 = evaluate_planner_objective(dr,M,oo,options)
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%function oo1 = evaluate_planner_objective(dr,M,oo,options)
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% computes value of planner objective function
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%
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% INPUTS
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% dr: (structure) decision rule
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% M: (structure) model description
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% oo: (structure) output results
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% options: (structure) options
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%
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% OUTPUTS
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% oo1: (structure) updated output results
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%
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% SPECIAL REQUIREMENTS
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% none
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% Copyright (C) 2007-2010 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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oo1 = oo;
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endo_nbr = M.endo_nbr;
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exo_nbr = M.exo_nbr;
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nstatic = dr.nstatic;
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npred = dr.npred;
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lead_lag_incidence = M.lead_lag_incidence;
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if (size(lead_lag_incidence,1) == 5) ...
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&& (nnz(lead_lag_incidence(1,:)) > 0 ...
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|| nnz(lead_lag_incidence(5,:)) > 0)
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error(['procedure not yet implemented for leads and lags on more ' ...
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'than one period'])
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end
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if options.ramsey_policy
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i_org = (1:M.orig_model.endo_nbr)';
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else
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i_org = (1:M.endo_nbr)';
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end
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ipred = find(lead_lag_incidence(M.maximum_lag,:))';
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order_var = dr.order_var;
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ys = oo.dr.ys;
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[U,Uy,Uyy] = feval([M.fname '_objective_static'],ys,zeros(1,exo_nbr), ...
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M.params);
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%K = reshape(1:endo_nbr^2,endo_nbr,endo_nbr);
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%K = K(order_var,order_var);
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%Uyy = Uyy(:,K(:));
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beta = options.planner_discount;
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gy(dr.order_var,:) = dr.ghx;
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gu(dr.order_var,:) = dr.ghu;
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Gy = gy(ipred,:);
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Gu = gu(ipred,:);
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gy = gy(i_org,:);
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gu = gu(i_org,:);
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Wbar = U/(1-beta);
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Wy = Uy*gy/(eye(npred)-beta*Gy);
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Wu = Uy*gu + beta*Wy*Gu;
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Wyy = Uyy*kron(gy,gy)/(eye(npred^2)-beta*kron(Gy,Gy));
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Wyu = Uyy*kron(gy,gu)+beta*Wyy*kron(Gy,Gu);
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Wuu = Uyy*kron(gu,gu)+beta*Wyy*kron(Gu,Gu);
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Wss = beta*Wuu*vec(M.Sigma_e)/(1-beta);
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if options.ramsey_policy
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yhat = [oo.endo_simul; ...
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zeros(M.endo_nbr-size(oo.endo_simul,1),1)];
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else
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yhat = oo.endo_simul;
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end
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yhat = yhat(dr.order_var(nstatic+(1:npred)),1)-dr.ys(dr.order_var(nstatic+(1:npred)));
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u = oo.exo_simul(1,:)';
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planner_objective_value = Wbar+Wy*yhat+Wu*u+Wyu*kron(yhat,u) ...
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+ 0.5*(Wyy*kron(yhat,yhat) + Wuu*kron(u,u)+Wss);
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oo1.planner_objective_value = planner_objective_value;
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if ~options.noprint
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disp(' ')
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if options.ramsey_policy
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disp(['Value of planner objective function under Ramsey policy: ' ...
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num2str(planner_objective_value)])
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else
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disp(['Value of planner objective function: ' ...
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num2str(planner_objective_value)])
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disp(' ')
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end
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end |