migration.gini.col.standardized: Standardized Columns Gini Index
Description
The standardized version of the Columns Gini Index
(migration.gini.col) by dividing that with
the Total Flows Gini Index
(migration.gini.total): $$G^{T*}_C =
100\frac{G^T_C}{G^T}$$ As this index is standardized, it
"facilitate comparisons from one period to the next" of
the columns indices.