The number of years it takes the population to double assuming the growth rate is constant. This number does not depend on the size of the population 70 / r r is a percentage but use whole number (use 2 for 2%)
Theory of Demographic Transition
says that as a country moves from a subsistence economy to industrialization and increased affluence, it undergoes a predictable shift in population growth
Phase 1 (of Transition)
- country experiences slow or no growth - birth rate = death rate - life expectancy is short due to working conditions -parents count on many children to care for them when they are old
Phase 2 (of transition)
- country experiences rapid growth -better sanitation, increased access to food and clean drinking water -infant mortality rate declines, but birth rate doesn't
Phase 3 (of transition)
-country experiences population stabilization - economy and education system improve -family income increases and people have fewer children
Phase 4 (of transition)
-country's population declines -fewer younger people leads to demographic shift- fewer people in work force
Total Fertility Rate (TFR)
an estimate of the average number of children that each woman in a population will bear throughout her childbearing years.
Replacement Level Fertility (RLF)
the TFR required to offset the average number of deaths in a population so that it remains stable. Typically the _______ is just over 2 children.
the average number of years that an individual in a particular year in a particular country can be expected to live -generally higher in countries with better healthcare, high resource consumption
the number of deaths of children under 1 year of age per 1,000 live births
the number of deaths of children under 5 per 1,000 live births
the regulation of the number or spacing of offspring through the use of birth control - when women have access to this birth rates drop
Impacts on TFR
Education -more education typically = fewer children Women in the workforce -women working = fewer children Family Planning (including contraceptives) -contraceptives = less children Income -less income = more kids to help out Cultural/Religous values -large families -abortion-abstinence Health Care/Mortality Rate -Better health care=less kids because they survive.