migration.effectiveness {migration.indices}

Migration Effectiveness Index

Description

The Migration Effectiveness Index "measures the degree of (a)symmetry or (dis)equilibrium in the network of interregional migration flows":

MEI = 100\frac{ \sum_i |D_i - O_i| }{ \sum_i |D_i + O_i| }

where D_i is the total inflows to zone i and O_i is the total outflows from zone i.

Usage

migration.effectiveness(m)

Arguments

m

migration matrix

Value

A number between 0 and 100 where the higher number shows an efficient mechanism of population redistribution.

References

• Martin Bell and Salut Muhidin (2009) Cross-National Comparisons of Internal Migration. Research Paper. UNDP. https://hdr.undp.org/content/cross-national-comparisons-internal-migration

Examples

data(migration.hyp)
migration.effectiveness(migration.hyp)
data(migration.world)
migration.effectiveness(migration.world)