# migration.connectivity: Migration Connectivity Index In migration.indices: Migration Indices

 migration.connectivity R Documentation

## Migration Connectivity Index

### Description

The Migration Connectivity Index measures "the proportion of the total number of potential interregional flows which are not zero":

I_{MC} = ∑_i ∑_{j \neq i} \frac{MC_{ij}}{n(n-1)}

where MC_{ij} is 0 if the flow from i to j is zero and let it be 1 otherwise.

### Usage

migration.connectivity(m)


### Arguments

 m migration matrix

### Value

A number between 0 and 1 where zero shows no connections between regions.

### References

• M. Bell, M. Blake, P. Boyle, O. Duke-Williams, P. Rees, J. Stillwell and G. Hugo (2002) Cross-National Comparison of Internal Migration. Issues and Measures. Journal of the Royal Statistical Society. Series A (Statistics in Society) 165, 435–464

### Examples

data(migration.hyp)
migration.connectivity(migration.hyp)
data(migration.world)
migration.connectivity(migration.world)


migration.indices documentation built on June 13, 2022, 5:08 p.m.