[IrisToolbox] for Macroeconomic Modeling

Main commands of the preparser

jaromir.benes@iris-toolbox.com

---

Split into multiple source files

• Extremely useful and simple technique to flexibly create slightly different versions of a model

• Use "bypass" files to exclude a certain sector

---

Code creation/branching commands

!if xxx
    a = a{-1} + shock_a;
!else
    a = b;
!end

!for y, c, g !do
    roc_? = ? / ?{-1};
!end

!for ?v = y, c, g !do
    !for ?n = 1, 2 !do
        roc_?v_?n = ?v_?n / ?v_?n{-1};
    !end
!end

x = !for <1:A> !do + x_? !end;
x = !for <list> !do + x_? !end;

Values of xxx, A and list need to be supplied when creating the model object using the option Assign=.

---

Substitutions

!substitutions

    adj := xi*(log(roc_cpi) - log(roc_cpi{-1}));

---

Matlab expression evaluation

<expression>

• The expression is evaluated in the context of values assigned through the Assign= option at the time of creating the model object

• The resulting value is attempted to be translated to a string or a list of strings

---

Pseudofunctions

diff(x+y{-1})
diff(x+y{-1}, -4)
roc(x+y{-1})
roc(x+y{-1}, -12)
pct(x+y{-1})
pct(x+y{-1}, +1)
movavg(x+y{-1}, -4)
movsum(x+y{-1}, -10)
movprod(x+y{-1}, +4)