DTM and natural population change Flashcards
what is the death rate?
average number of live births per year
what is the birth rate?
average number of births per year
what is the infant mortality rate?
the amount of people who die before their first birthday
how many stages of the DTM are there?
5
what happens in stage 1?
period of high birth rate and high death rate. population growth = small
reasons for high birth rates (stage 1)
limited birth control/family planning
high infant mortality rate encourages birth of more children
children = future source of income
reasons for high death rate (stage 1 )
high incidence of disease
poor nutrition
poor hygiene
underdeveloped health facilities
what happens in stage 2 >?
periof of high birth rate but death rate falls
reason for falling death rates (stage 2)
economic development improved public health better nutrition lower child mortality improved medical provision
what happens in stage 3?
period of falling birth rate and continued fall in death rate
reasons for falling birth rate (stage 3)
changing socio-economic conditions greater access to education preferences for smaller families lower infant mortality rate increased personal wealth
what happens in stage 4?
period of low BR and DR
more women in workforce with many having high personal incomes and more leisure interests
what happens in stage 5?
death rate slightly exceeds birth rate causing population decline
What are the limitations of the DTM
it does not include the influences of migration
it assumes all countries will go through the same pattern
no time scale
reasons for BR and DR vary in different countries
assumption - all countries will develop
some countries show little sign of this