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Cosmetic change. 

This patch provide a mathematically equivalent approach to update the growth
neutrality correction.

(cherry picked from commit 980a890487cd983eba027bdec63c8a777fd793f7)
pac-components
Stéphane Adjemian (Ryûk) 2021-11-05 08:57:35 +01:00
parent d3ecfd5de7
commit 0c9eb182c4
Signed by: stepan
GPG Key ID: 295C1FE89E17EB3C
1 changed files with 5 additions and 5 deletions
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10
matlab/+pac/+update/parameters.m
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@ -186,7 +186,7 @@ for e=1:number_of_pac_eq
% there is no exogenous variables in the model and in the
% absence of non optimizing agents.
gg = -(growthneutrality-1); % Finite sum of autoregressive parameters + infinite sum of the coefficients in the PAC expectation term.
cc = 1.0/gamma-gg; % First adjustment of the growth neutrality correction (should also be divided by gamma, done below at the end of this section).
cc = 1.0-gg*gamma; % First adjustment of the growth neutrality correction (should also be divided by gamma, done below at the end of this section).
% We may have to further change the correction if we have nonzero mean exogenous variables.
ll = 0.0;
if isfield(equations.(eqtag), 'optim_additive')
@ -201,7 +201,7 @@ for e=1:number_of_pac_eq
error('It is not possible to provide a value for the mean of an exogenous variable appearing in the optimal part of the PAC equation.')
end
end
cc = cc - tmp0;
cc = cc - tmp0*gamma;
end
if gamma<1
if isfield(equations.(eqtag), 'non_optimizing_behaviour') && isfield(equations.(eqtag).non_optimizing_behaviour, 'params')
@ -219,7 +219,7 @@ for e=1:number_of_pac_eq
tmp1 = tmp1 + equations.(eqtag).non_optimizing_behaviour.scaling_factor(i)*equations.(eqtag).non_optimizing_behaviour.params(i)*equations.(eqtag).non_optimizing_behaviour.bgp{i};
end
end
cc = cc - (1.0-gamma)*tmp0/gamma;
cc = cc - (1.0-gamma)*tmp0;
ll = -(1.0-gamma)*tmp1/gamma; % TODO: ll should be added as a constant in the PAC equation (under the λ part) when unrolling pac_expectation.
end
end
@ -238,9 +238,9 @@ for e=1:number_of_pac_eq
tmp1 = tmp1 + equations.(eqtag).additive.scaling_factor(i)*equations.(eqtag).additive.params(i)*equations.(eqtag).additive.bgp{i};
end
end
cc = cc - tmp0/gamma;
cc = cc - tmp0;
ll = ll - tmp1/gamma; % TODO: ll should be added as a constant in the PAC equation (under the λ part) when unrolling pac_expectation.
end
DynareModel.params(pacmodel.growth_neutrality_param_index) = cc; % Multiplies the variable or expression provided though the growth option in command pac_model.
DynareModel.params(pacmodel.growth_neutrality_param_index) = cc/gamma; % Multiplies the variable or expression provided though the growth option in command pac_model.
end
end