diff --git a/examples/5/example.mod b/examples/5/example.mod new file mode 100644 index 000000000..bd26c3886 --- /dev/null +++ b/examples/5/example.mod @@ -0,0 +1,74 @@ +// --+ options: json=compute +-- + +var x1 x2 x1bar x2bar z ; + +varexo ex1 ex2 ex1bar ex2bar ez ; + +parameters a_x1_0 a_x1_1 a_x1_2 a_x1_x2_1 a_x1_x2_2 + a_x2_0 a_x2_1 a_x2_2 a_x2_x1_1 a_x2_x1_2 + e_c_m c_z_1 c_z_2 gamma beta ; + +a_x1_0 = -.9; +a_x1_1 = .4; +a_x1_2 = .3; +a_x1_x2_1 = .1; +a_x1_x2_2 = .2; + + +a_x2_0 = -.9; +a_x2_1 = .2; +a_x2_2 = -.1; +a_x2_x1_1 = -.1; +a_x2_x1_2 = .2; + +beta = .1; +e_c_m = .1; +c_z_1 = .07; +c_z_2 = -.3; + +gamma = .7; + +var_model(model_name=toto, eqtags=['eq:x1', 'eq:x2', 'eq:x1bar', 'eq:x2bar']); + +pac_model(var_model_name=toto, discount=beta, model_name=pacman, undiff('eq:x1', 1), undiff('eq:x2', 1)); + +model; + +[name='eq:x1', data_type='nonstationary'] +diff(diff(x1)) = a_x1_0*(diff(x1(-1))-diff(x1bar(-1))) + a_x1_1*diff(diff(x1(-1))) + a_x1_2*diff(diff(x1(-2))) + a_x1_x2_1*diff(x2(-1)) + a_x1_x2_2*diff(x2(-2)) + ex1; + +[name='eq:x2', data_type='nonstationary'] +diff(x2) = a_x2_0*(x2(-1)-x2bar(-1)) + a_x2_1*diff(diff(x1(-1))) + a_x2_2*diff(diff(x1(-2))) + a_x2_x1_1*diff(x2(-1)) + a_x2_x1_2*diff(x2(-2)) + ex2; + +[name='eq:x1bar', data_type='nonstationary'] +diff(x1bar) = diff(x1bar(-1)) + ex1bar; + + +[name='eq:x2bar', data_type='nonstationary'] +x2bar = x2bar(-1) + ex2bar; + +[name='eq:pac'] +diff(z) = gamma*(e_c_m*(x1(-1)-z(-1)) + c_z_1*diff(z(-1)) + c_z_2*diff(z(-2)) + pac_expectation(pacman)) + (1-gamma)*ez; + + +end; + +shocks; + var ex1 = 1.0; + var ex2 = 1.0; + var ex1bar = 1.0; + var ex2bar = 1.0; + var ez = 1.0; +end; + +// Build the companion matrix of the VAR model (toto). +get_companion_matrix('toto', 'pacman'); + +// Update the parameters of the PAC expectation model (h0 and h1 vectors). +pac.update.equation('pacman'); + +// Set initial conditions to zero. Please use more sensible values if any... +initialconditions = dseries(zeros(10, M_.endo_nbr+M_.exo_nbr), 2000Q1, vertcat(M_.endo_names,M_.exo_names)); + +// Simulate the model for 500 periods +TrueData = simul_backward_model(initialconditions, 500); \ No newline at end of file