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manual: add info about ramsey_policy auxiliary variables

time-shift
Houtan Bastani 2011-03-30 12:11:57 +02:00
parent 718be0074c
commit ff0eb13c5f
1 changed files with 12 additions and 2 deletions
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doc/dynare.texi
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@ -1586,6 +1586,13 @@ operator. For each occurence of this operator, Dynare creates an
auxiliary variable equal to @code{AUX_EXPECT_LAG_1 = x(+2)}, and
replaces the expectation operator by @code{AUX_EXPECT_LAG_1(-1)}.
Auxiliary variables are also introduced by the preprocessor for the
@code{ramsey_policy} command. In this case, they are used to represent the Lagrange
multipliers when first order conditions of the ramsey problem are computed.
The new variables take the form @code{MULT_@var{i}}, where @var{i} represents
the constraint with which the multiplier is associated (counted from the
order of declaration in the model block).
Once created, all auxiliary variables are included in the set of
endogenous variables. The output of decision rules (see below) is such
that auxiliary variable names are replaced by the original variables
@ -4402,8 +4409,11 @@ This command computes the first order approximation of the policy that
maximizes the policy maker objective function submitted to the
constraints provided by the equilibrium path of the economy.
The planner objective must be declared with the
@code{planner_objective} command.
The planner objective must be declared with the @code{planner_objective} command.
@xref{Auxiliary
variables}, for an explanation of how this operator is handled
internally and how this affects the output.
@optionshead