var — declares endogenous variables
var
VARIABLE_NAME
[
,
] [
VARIABLE_NAME
...] ;
This required command declares the endogenous variables in the model. The variable names must start with a letter and can't contain the following characters : ()+-*/^=!;:@#. or accentuated characters.
In Gauss, setting _longname = 1
allows the use of more than 8 characters in the variable names and makes a distinction between lower and upper case letters.