Question

Distinguish between the two main methods of projecting migration under the cohort component methods.

Answer 1

There are two main methods of projecting migration in cohort components method and they are direct method and indirect measures which can be distinguished as 1. Direct method which can be divided into (a). Continuous registration system; individual report their change in residence immediately to a local government office. (b) use of census information: based on census question of " where were you living 5 years ago"? In this case, planners compare the place of residence with the place of prior residence.

2. Indirect measures: (a) vital statistics or residual method (b) Survival ratio method. Most planners rely on indirect measures for obtaining migration information.