Draco implements two basic data types: variables and constants.
Constants refer to scalar values that are defined independent from any
series data. In other words, a Draco constant value does not vary
within panel data or time series. All constant values are stored in
double precision floating point format.
A constant value, however, can be changed at any time. Constants may be
accessed from the
Constants Window at any time. Constants can be created, modified
and deleted.
Constants can also be used similar to standard
Variables within dialogs where equations may be entered.