v4: more changes related to new filter
more variables returned by the smoother saved in oo_ DiffuseKalmanSmoother1_Z.m isn't finished yet git-svn-id: https://www.dynare.org/svn/dynare/dynare_v4@1689 ac1d8469-bf42-47a9-8791-bf33cf982152time-shift
parent
290722e3fd
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2f3767d317
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@ -1,4 +1,4 @@
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function [alphahat,etahat,a, aK] = DiffuseKalmanSmoother1_Z(T,Z,R,Q,Pinf1,Pstar1,Y,pp,mm,smpl)
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function [alphahat,etahat,a,aK,P,PK,d] = DiffuseKalmanSmoother1_Z(T,Z,R,Q,Pinf1,Pstar1,Y,pp,mm,smpl)
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% function [alphahat,etahat,a, aK] = DiffuseKalmanSmoother1(T,Z,R,Q,Pinf1,Pstar1,Y,pp,mm,smpl)
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% function [alphahat,etahat,a, aK] = DiffuseKalmanSmoother1(T,Z,R,Q,Pinf1,Pstar1,Y,pp,mm,smpl)
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% Computes the diffuse kalman smoother without measurement error, in the case of a non-singular var-cov matrix
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% Computes the diffuse kalman smoother without measurement error, in the case of a non-singular var-cov matrix
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@ -20,7 +20,14 @@ function [alphahat,etahat,a, aK] = DiffuseKalmanSmoother1_Z(T,Z,R,Q,Pinf1,Pstar1
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% etahat: smoothed shocks
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% etahat: smoothed shocks
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% a: matrix of one step ahead filtered state variables
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% a: matrix of one step ahead filtered state variables
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% aK: 3D array of k step ahead filtered state variables
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% aK: 3D array of k step ahead filtered state variables
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% (meaningless for periods 1:d)
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% P: 3D array of one-step ahead forecast error variance
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% matrices
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% PK: 4D array of k-step ahead forecast error variance
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% matrices (meaningless for periods 1:d)
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% d: number of periods where filter remains in diffuse part
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% (should be equal to the order of integration of the model)
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%
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% SPECIAL REQUIREMENTS
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% SPECIAL REQUIREMENTS
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% See "Filtering and Smoothing of State Vector for Diffuse State Space
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% See "Filtering and Smoothing of State Vector for Diffuse State Space
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% Models", S.J. Koopman and J. Durbin (2003, in Journal of Time Series
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% Models", S.J. Koopman and J. Durbin (2003, in Journal of Time Series
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@ -44,7 +51,8 @@ spinf = size(Pinf1);
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spstar = size(Pstar1);
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spstar = size(Pstar1);
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v = zeros(pp,smpl);
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v = zeros(pp,smpl);
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a = zeros(mm,smpl+1);
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a = zeros(mm,smpl+1);
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aK = zeros(nk,mm,smpl+1);
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aK = zeros(nk,mm,smpl+nk);
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PK = zeros(nk,mm,mm,smpl+nk);
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iF = zeros(pp,pp,smpl);
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iF = zeros(pp,pp,smpl);
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Fstar = zeros(pp,pp,smpl);
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Fstar = zeros(pp,pp,smpl);
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iFinf = zeros(pp,pp,smpl);
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iFinf = zeros(pp,pp,smpl);
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@ -77,6 +85,7 @@ while rank(Pinf(:,:,t+1),crit1) & t<smpl
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Kinf(:,:,t) = T*Pinf(:,:,t)*Z'*iFinf(:,:,t);
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Kinf(:,:,t) = T*Pinf(:,:,t)*Z'*iFinf(:,:,t);
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a(:,t+1) = T*a(:,t) + Kinf(:,:,t)*v(:,t);
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a(:,t+1) = T*a(:,t) + Kinf(:,:,t)*v(:,t);
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aK(1,:,t+1) = a(:,t+1);
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aK(1,:,t+1) = a(:,t+1);
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% isn't a meaningless as long as we are in the diffuse part? MJ
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for jnk=2:nk,
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for jnk=2:nk,
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aK(jnk,:,t+jnk) = T^(jnk-1)*a(:,t+1);
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aK(jnk,:,t+jnk) = T^(jnk-1)*a(:,t+1);
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end
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end
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@ -107,11 +116,15 @@ while notsteady & t<smpl
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K(:,:,t) = T*P(:,:,t)*Z'*iF(:,:,t);
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K(:,:,t) = T*P(:,:,t)*Z'*iF(:,:,t);
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L(:,:,t) = T-K(:,:,t)*Z;
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L(:,:,t) = T-K(:,:,t)*Z;
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a(:,t+1) = T*a(:,t) + K(:,:,t)*v(:,t);
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a(:,t+1) = T*a(:,t) + K(:,:,t)*v(:,t);
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aK(1,:,t+1) = a(:,t+1);
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af = a(:,t);
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for jnk=2:nk,
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Pf = P(:,:,t);
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aK(jnk,:,t+jnk) = T^(jnk-1)*a(:,t+1);
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for jnk=1:nk,
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af = T*af;
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Pf = T*Pf*T' + QQ;
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aK(jnk,:,t+jnk) = af;
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PK(jnk,:,:,t+jnk) = Pf;
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end
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end
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P(:,:,t+1) = T*P(:,:,t)*transpose(T)-T*P(:,:,t)*Z'*K(:,:,t)' + QQ;
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P(:,:,t+1) = T*P(:,:,t)*T'-T*P(:,:,t)*Z'*K(:,:,t)' + QQ;
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notsteady = ~(max(max(abs(P(:,:,t+1)-P(:,:,t))))<crit);
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notsteady = ~(max(max(abs(P(:,:,t+1)-P(:,:,t))))<crit);
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end
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end
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K_s = K(:,:,t);
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K_s = K(:,:,t);
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@ -127,9 +140,13 @@ while t<smpl
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t=t+1;
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t=t+1;
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v(:,t) = Y(:,t) - Z*a(:,t);
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v(:,t) = Y(:,t) - Z*a(:,t);
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a(:,t+1) = T*a(:,t) + K_s*v(:,t);
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a(:,t+1) = T*a(:,t) + K_s*v(:,t);
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aK(1,:,t+1) = a(:,t+1);
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af = a(:,t);
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for jnk=2:nk,
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Pf = P(:,:,t);
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aK(jnk,:,t+jnk) = T^(jnk-1)*a(:,t+1);
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for jnk=1:nk,
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af = T*af;
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Pf = T*Pf*T' + QQ;
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aK(jnk,:,t+jnk) = af;
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PK(jnk,:,:,t+jnk) = Pf;
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end
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end
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end
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end
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t = smpl+1;
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t = smpl+1;
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@ -1,6 +1,6 @@
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function [alphahat,etahat,a1, aK] = DiffuseKalmanSmoother3_Z(T,Z,R,Q,Pinf1,Pstar1,Y,pp,mm,smpl)
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function [alphahat,etahat,a1,P,aK,PK,d,decomp] = DiffuseKalmanSmoother3_Z(T,Z,R,Q,Pinf1,Pstar1,Y,pp,mm,smpl)
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% function [alphahat,etahat,a1, aK] = DiffuseKalmanSmoother3(T,Z,R,Q,Pinf1,Pstar1,Y,pp,mm,smpl)
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% function [alphahat,etahat,a1,P,aK,PK,d,decomp_filt] = DiffuseKalmanSmoother3(T,Z,R,Q,Pinf1,Pstar1,Y,pp,mm,smpl)
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% Computes the diffuse kalman smoother without measurement error, in the case of a singular var-cov matrix.
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% Computes the diffuse kalman smoother without measurement error, in the case of a singular var-cov matrix.
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% Univariate treatment of multivariate time series.
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% Univariate treatment of multivariate time series.
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%
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%
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@ -21,7 +21,15 @@ function [alphahat,etahat,a1, aK] = DiffuseKalmanSmoother3_Z(T,Z,R,Q,Pinf1,Pstar
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% etahat: smoothed shocks
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% etahat: smoothed shocks
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% a1: matrix of one step ahead filtered state variables
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% a1: matrix of one step ahead filtered state variables
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% aK: 3D array of k step ahead filtered state variables
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% aK: 3D array of k step ahead filtered state variables
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% (meaningless for periods 1:d)
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% P: 3D array of one-step ahead forecast error variance
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% matrices
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% PK: 4D array of k-step ahead forecast error variance
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% matrices (meaningless for periods 1:d)
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% d: number of periods where filter remains in diffuse part
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% (should be equal to the order of integration of the model)
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% decomp: decomposition of the effect of shocks on filtered values
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%
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% SPECIAL REQUIREMENTS
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% SPECIAL REQUIREMENTS
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% See "Filtering and Smoothing of State Vector for Diffuse State Space
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% See "Filtering and Smoothing of State Vector for Diffuse State Space
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% Models", S.J. Koopman and J. Durbin (2003, in Journal of Time Series
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% Models", S.J. Koopman and J. Durbin (2003, in Journal of Time Series
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@ -67,7 +75,9 @@ Linf = zeros(mm,mm,pp,smpl_diff);
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L0 = zeros(mm,mm,pp,smpl_diff);
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L0 = zeros(mm,mm,pp,smpl_diff);
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Kstar = zeros(mm,pp,smpl_diff);
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Kstar = zeros(mm,pp,smpl_diff);
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P = zeros(mm,mm,smpl+1);
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P = zeros(mm,mm,smpl+1);
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P1 = P;
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P1 = P;
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aK = zeros(nk,mm,smpl+nk);
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PK = zeros(nk,mm,mm,smpl+nk);
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Pstar = zeros(spstar(1),spstar(2),smpl_diff+1); Pstar(:,:,1) = Pstar1;
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Pstar = zeros(spstar(1),spstar(2),smpl_diff+1); Pstar(:,:,1) = Pstar1;
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Pinf = zeros(spinf(1),spinf(2),smpl_diff+1); Pinf(:,:,1) = Pinf1;
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Pinf = zeros(spinf(1),spinf(2),smpl_diff+1); Pinf(:,:,1) = Pinf1;
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Pstar1 = Pstar;
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Pstar1 = Pstar;
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@ -75,7 +85,7 @@ Pinf1 = Pinf;
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crit = options_.kalman_tol;
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crit = options_.kalman_tol;
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crit1 = 1.e-6;
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crit1 = 1.e-6;
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steady = smpl;
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steady = smpl;
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rr = size(Q,1);
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rr = size(Q,1); % number of structural shocks
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QQ = R*Q*transpose(R);
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QQ = R*Q*transpose(R);
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QRt = Q*transpose(R);
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QRt = Q*transpose(R);
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alphahat = zeros(mm,smpl);
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alphahat = zeros(mm,smpl);
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@ -180,18 +190,25 @@ while notsteady & t<smpl
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end
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end
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end
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end
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a(:,t+1) = T*a(:,t);
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a(:,t+1) = T*a(:,t);
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af = a(:,t);
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Pf = P(:,:,t);
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for jnk=1:nk,
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for jnk=1:nk,
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aK(jnk,:,t+jnk) = T^jnk*a(:,t);
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af = T*af;
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Pf = T*Pf*T' + QQ;
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aK(jnk,:,t+jnk) = af;
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PK(jnk,:,:,t+jnk) = Pf;
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end
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end
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P(:,:,t+1) = T*P(:,:,t)*T' + QQ;
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P(:,:,t+1) = T*P(:,:,t)*T' + QQ;
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notsteady = ~(max(max(abs(P(:,:,t+1)-P(:,:,t))))<crit);
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notsteady = ~(max(max(abs(P(:,:,t+1)-P(:,:,t))))<crit);
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end
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end
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P_s=tril(P(:,:,t))+tril(P(:,:,t),-1)';
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P_s=tril(P(:,:,t))+tril(P(:,:,t),-1)';
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P1_s=tril(P1(:,:,t))+tril(P1(:,:,t),-1)';
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Fi_s = Fi(:,t);
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Fi_s = Fi(:,t);
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Ki_s = Ki(:,:,t);
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Ki_s = Ki(:,:,t);
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L_s =Li(:,:,:,t);
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L_s =Li(:,:,:,t);
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if t<smpl
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if t<smpl
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P = cat(3,P(:,:,1:t),repmat(P_s,[1 1 smpl-t]));
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P = cat(3,P(:,:,1:t),repmat(P_s,[1 1 smpl-t]));
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P1 = cat(3,P1(:,:,1:t),repmat(P1_s,[1 1 smpl-t]));
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Fi = cat(2,Fi(:,1:t),repmat(Fi_s,[1 1 smpl-t]));
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Fi = cat(2,Fi(:,1:t),repmat(Fi_s,[1 1 smpl-t]));
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Li = cat(4,Li(:,:,:,1:t),repmat(L_s,[1 1 smpl-t]));
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Li = cat(4,Li(:,:,:,1:t),repmat(L_s,[1 1 smpl-t]));
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Ki = cat(3,Ki(:,:,1:t),repmat(Ki_s,[1 1 smpl-t]));
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Ki = cat(3,Ki(:,:,1:t),repmat(Ki_s,[1 1 smpl-t]));
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@ -207,8 +224,13 @@ while t<smpl
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end
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end
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end
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end
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a(:,t+1) = T*a(:,t);
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a(:,t+1) = T*a(:,t);
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af = a(:,t);
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Pf = P(:,:,t);
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for jnk=1:nk,
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for jnk=1:nk,
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aK(jnk,:,t+jnk) = T^jnk*a(:,t);
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af = T*af;
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Pf = T*Pf*T' + QQ;
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aK(jnk,:,t+jnk) = af;
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PK(jnk,:,:,t+jnk) = Pf;
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end
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end
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end
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end
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a1(:,t+1) = a(:,t+1);
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a1(:,t+1) = a(:,t+1);
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@ -270,3 +292,29 @@ else
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end
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end
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a=a(:,1:end-1);
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a=a(:,1:end-1);
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if nargout > 7
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decomp = zeros(nk,mm,rr,smpl+nk);
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ZRQinv = inv(Z*QQ*Z');
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for t = d:smpl
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ri_d = zeros(mm,1);
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for i=pp:-1:1
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if Fi(i,t) > crit
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ri_d = Z(i,:)'/Fi(i,t)*v(i,t)+Li(:,:,i,t)'*ri_d;
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end
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end
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% calculate eta_tm1t
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eta_tm1t = QRt*ri_d;
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% calculate decomposition
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Ttok = eye(mm,mm);
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for h = 1:nk
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for j=1:rr
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eta=zeros(rr,1);
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eta(j) = eta_tm1t(j);
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decomp(h,:,j,t+h) = Ttok*P1(:,:,t)*Z'*ZRQinv*Z*R*eta;
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end
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Ttok = T*Ttok;
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end
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end
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end
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function [alphahat,etahat,epsilonhat,ahat,SteadyState,trend_coeff,aK,T,R] = DsgeSmoother(xparam1,gend,Y)
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function [alphahat,etahat,epsilonhat,ahat,SteadyState,trend_coeff,aK,T,R,P,PK,d,decomp] = DsgeSmoother(xparam1,gend,Y)
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% Estimation of the smoothed variables and innovations.
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% Estimation of the smoothed variables and innovations.
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%
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%
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% INPUTS
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% INPUTS
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% o SteadyState [double] (m*1) vector specifying the steady state level of each endogenous variable.
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% o SteadyState [double] (m*1) vector specifying the steady state level of each endogenous variable.
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% o trend_coeff [double] (n*1) vector, parameters specifying the slope of the trend associated to each observed variable.
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% o trend_coeff [double] (n*1) vector, parameters specifying the slope of the trend associated to each observed variable.
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% o aK [double] (K,n,T+K) array, k (k=1,...,K) steps ahead filtered (endogenous) variables.
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% o aK [double] (K,n,T+K) array, k (k=1,...,K) steps ahead filtered (endogenous) variables.
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% o T and R [double] Matrices defining the state equation (T is the (m*m) transition matrix).
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% o T and R [double] Matrices defining the state equation (T is
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% the (m*m) transition matrix).
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% P: 3D array of one-step ahead forecast error variance
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% matrices
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% PK: 4D array of k-step ahead forecast error variance
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% matrices (meaningless for periods 1:d)
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% d: number of periods where filter remains in diffuse part
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% (should be equal to the order of integration of the model)
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%
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% ALGORITHM
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% ALGORITHM
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% Metropolis-Hastings.
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% Diffuse Kalman filter (Durbin and Koopman)
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%
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%
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% SPECIAL REQUIREMENTS
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% SPECIAL REQUIREMENTS
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% None.
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% None.
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global bayestopt_ M_ oo_ estim_params_ options_
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global bayestopt_ M_ oo_ estim_params_ options_
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alphahat = [];
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alphahat = [];
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epsilonhat = [];
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etahat = [];
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etahat = [];
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epsilonhat = [];
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ahat = [];
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SteadyState = [];
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trend_coeff = [];
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aK = [];
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T = [];
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R = [];
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P = [];
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PK = [];
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d = [];
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decomp = [];
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nobs = size(options_.varobs,1);
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nobs = size(options_.varobs,1);
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smpl = size(Y,2);
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smpl = size(Y,2);
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@ -168,15 +186,31 @@ function [alphahat,etahat,epsilonhat,ahat,SteadyState,trend_coeff,aK,T,R] = Dsge
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end
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end
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elseif options_.kalman_algo == 3
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elseif options_.kalman_algo == 3
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[alphahat,etahat,ahat,aK] = DiffuseKalmanSmoother3(T,R,Q,Pinf,Pstar,Y,trend,nobs,np,smpl,mf);
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[alphahat,etahat,ahat,aK] = DiffuseKalmanSmoother3(T,R,Q,Pinf,Pstar,Y,trend,nobs,np,smpl,mf);
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elseif options_.kalman_algo == 4
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elseif options_.kalman_algo == 4 | options_.kalman_algo == 5
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data1 = Y - trend;
|
data1 = Y - trend;
|
||||||
[alphahat,etahat,ahat,aK] = DiffuseKalmanSmoother1_Z(ST,Z,R1,Q,Pinf,Pstar,data1,nobs,np,smpl);
|
if options_.kalman_algo == 4
|
||||||
alphahat = QT*alphahat;
|
[alphahat,etahat,ahat,P,aK,PK,d] = DiffuseKalmanSmoother1_Z(ST, ...
|
||||||
ahat = QT*ahat;
|
Z,R1,Q,Pinf,Pstar,data1,nobs,np,smpl);
|
||||||
elseif options_.kalman_algo == 5
|
else
|
||||||
data1 = Y - trend;
|
[alphahat,etahat,ahat,P,aK,PK,d,decomp] = DiffuseKalmanSmoother3_Z(ST, ...
|
||||||
[alphahat,etahat,ahat,aK] = DiffuseKalmanSmoother3_Z(ST,Z,R1,Q,Pinf,Pstar,data1,nobs,np,smpl);
|
Z,R1,Q,Pinf,Pstar,data1,nobs,np,smpl);
|
||||||
|
end
|
||||||
alphahat = QT*alphahat;
|
alphahat = QT*alphahat;
|
||||||
ahat = QT*ahat;
|
ahat = QT*ahat;
|
||||||
|
if options_.nk > 0
|
||||||
|
nk = options_.nk;
|
||||||
|
for jnk=1:nk
|
||||||
|
aK(jnk,:,:) = QT*squeeze(aK(jnk,:,:));
|
||||||
|
for i=1:size(PK,4)
|
||||||
|
PK(jnk,:,:,i) = QT*squeeze(PK(jnk,:,:,i))*QT';
|
||||||
|
end
|
||||||
|
for i=1:size(decomp,4)
|
||||||
|
decomp(jnk,:,:,i) = QT*squeeze(decomp(jnk,:,:,i));
|
||||||
|
end
|
||||||
|
end
|
||||||
|
for i=1:size(P,4)
|
||||||
|
P(:,:,i) = QT*squeeze(P(:,:,i))*QT';
|
||||||
|
end
|
||||||
|
end
|
||||||
end
|
end
|
||||||
end
|
end
|
||||||
|
|
|
@ -880,11 +880,20 @@ if (any(bayestopt_.pshape >0 ) & options_.mh_replic) | ...
|
||||||
% return
|
% return
|
||||||
end
|
end
|
||||||
|
|
||||||
if ~((any(bayestopt_.pshape > 0) & options_.mh_replic) | (any(bayestopt_.pshape ...
|
if (~((any(bayestopt_.pshape > 0) & options_.mh_replic) | (any(bayestopt_.pshape ...
|
||||||
> 0) & options_.load_mh_file)) | ~options_.smoother
|
> 0) & options_.load_mh_file)) ...
|
||||||
|
| ~options_.smoother ) & M_.endo_nbr^2*gend < 1e6 % to be fixed
|
||||||
%% ML estimation, or posterior mode without metropolis-hastings or metropolis without bayesian smooth variable
|
%% ML estimation, or posterior mode without metropolis-hastings or metropolis without bayesian smooth variable
|
||||||
options_.lik_algo = 2;
|
[atT,innov,measurement_error,filtered_state_vector,ys,trend_coeff,aK,T,R,P,PK,d,decomp] = DsgeSmoother(xparam1,gend,data);
|
||||||
[atT,innov,measurement_error,filtered_state_vector,ys,trend_coeff] = DsgeSmoother(xparam1,gend,data);
|
oo_.Smoother.SteadyState = ys;
|
||||||
|
oo_.Smoother.TrendCoeffs = trend_coeff;
|
||||||
|
oo_.Smoother.integration_order = d;
|
||||||
|
oo_.Smoother.variance = P;
|
||||||
|
if options_.nk ~= 0
|
||||||
|
oo_.FilteredVariablesKStepAhead = aK(options_.filter_step_ahead,:,:);
|
||||||
|
oo_.FilteredVariablesKStepAheadVariances = PK(options_.filter_step_ahead,:,:,:);
|
||||||
|
oo_.FilteredVariablesShockDecomposition = decomp(options_.filter_step_ahead,:,:,:);
|
||||||
|
end
|
||||||
for i=1:M_.endo_nbr
|
for i=1:M_.endo_nbr
|
||||||
eval(['oo_.SmoothedVariables.' deblank(M_.endo_names(dr.order_var(i),:)) ' = atT(i,:)'';']);
|
eval(['oo_.SmoothedVariables.' deblank(M_.endo_names(dr.order_var(i),:)) ' = atT(i,:)'';']);
|
||||||
eval(['oo_.FilteredVariables.' deblank(M_.endo_names(dr.order_var(i),:)) ' = filtered_state_vector(i,:)'';']);
|
eval(['oo_.FilteredVariables.' deblank(M_.endo_names(dr.order_var(i),:)) ' = filtered_state_vector(i,:)'';']);
|
||||||
|
|
Loading…
Reference in New Issue