Age patterns of migration (cont.)
What is the age pattern of migration?
In a classical study, Louis Castro, Andrei Rogers & Frans Willlekens at IIASA, collected data on age specific migration rates from 17 countries in the Comparative Migration and Settlement Study.
The Figure bellow shows a common "shape" for migration in and out of two European cities.
Castro et al. discovered some basic regularities in shape.
Describe these below.
- a descending slope from age 0
- a trough between age 10 and 15
- a sharp ascent between 15 and 20
- a peak between 20 and 25
- descending rates to about 50 or 55
After these ages they found: more or less constant rates; or increasing rates at older ages; or another small peak around 65.