Describe Blacker's view on demographic transition.

According to C.P. Blacker, demographic transition in developed nations can be divided into five phases. These are:

·         High stationary stage

·         Early expanding stage

·         Late expanding stage

·         Low stationary stage

·         Diminishing stage

             i.     High stationary stage: In this stage, the population of a country is approximately stationary due to high birth and death rates, ranging from 40-50 per thousand per year. This stage is common in those countries that are dependent on agriculture. As a result, the standard of living is very low.

             ii.     Early expanding Stage: In this stage, the birth rate is stationary (high level), whereas death rate begins to decline very slowly. As a result of this, the population starts rising slowly. Most of the developing countries have this stage of demographic transition.

            iii.     Late expanding stage: In this stage, both the birth rate and the death rate are under control and at a low level. Thus, in this stage the growth rate in population is most negligible. There is very low fertility and mortality rate. Most of the developed countries fall in this category.

Diminishing stage: In this stage, the growth of population starts declining because of a low fertility rate and a high mortality rate.