demography (version 2.0)

netmigration: Calculate net migration from mortality and fertility data

Description

Function to compute the net number of migrants in each year and for each age, based on the total population numbers, deaths and births in each year.

Usage

netmigration(mort, fert, startyearpop=mort, mfratio = 1.05)

Value

Object of class “demogdata” with the following components:

year

Vector of years

age

Vector of ages

rate

List containing matrices of net migration numbers (not "rates") with with one age group per row and one column per year. Names of matrices are the same as for mort$rate.

pop

List containing matrices of populations in same form as rate and containing population numbers.

type

Type of object. In this case, “migration”.

label

label from mort$label

Arguments

mort

Demogdata object of type "mortality"

fert

Demogdata object of type "fertility"

startyearpop

Demogdata object containing population data for first year of calculation.

mfratio

Male-female ratio to be used in simulating births.

Author

Rob J Hyndman

See Also

demogdata

Examples

if (FALSE) {
require(addb)
aus.mig <- netmigration(australia,aus.fertility)
plot(aus.mig)}