migration.gini.col.standardized: Standardized Columns Gini Index

In daroczig/migration.indices: Migration indices

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.

Usage

migration.gini.col.standardized(m, gini.total = migration.gini.total(m,
  FALSE))

Arguments

m	migration matrix
gini.total	optionally pass the pre-computed Total Flows Gini Index to save computational resources

Value

A percentage range from 0% to 100% where 0% means that the migration flows are uniform, while a higher value indicates spatial focusing.

References

• David A. Plane and Gordon F. Mulligan (1997) Measuring Spatial Focusing in a Migration System. Demography 34, 251–262

See Also

migration.gini.col migration.gini.row.standardized

Examples

data(migration.hyp)
migration.gini.col.standardized(migration.hyp)     # 25
migration.gini.col.standardized(migration.hyp2)    # 22.22222

daroczig/migration.indices documentation built on May 14, 2019, 6:09 p.m.