migration.indices (version 0.3.0)

migration.effectiveness: 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. http://hdr.undp.org/en/reports/global/hdr2009/papers/HDRP_2009_30.pdf

Examples

# NOT RUN {
data(migration.hyp)
migration.effectiveness(migration.hyp)
data(migration.world)
migration.effectiveness(migration.world)
# }