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.