The four factors that can affect population size are fertility rate, mortality rate, immigration and emigration. Fertility rate and mortality rate are often grouped together as are immigration and emigration.
Continue ReadingThe fertility rate of a population refers to the average amount of children that women have throughout their lifetime, adjusted to births per certain amount of the population in the year. The opposing factor to fertility rate is mortality rate, which is equal to the typical amount of deaths per the same amount of the population in the year. Finally, immigration is a count of how many foreigners become residents of the country, while emigration is a count of how many residents leave the country.
Learn more about Population & DemographySubtracting a past population value from the present population value, and dividing this result by the past population value, yields the population-growth rate. Multiplying the population-growth rate by 100 yields the growth percentage.
Full Answer >Calculate population growth rate by dividing the change in population for the time by the initial population and multiplying by 100. The number is expressed as a percentage.
Full Answer >The crude birth rate is calculated by dividing the number of the total population by the number of births in one year, according to Columbia University. The CBR of a population can be used to assign a stage of development.
Full Answer >China's so-called one child policy has had the effect of drastically reducing the birth rate and controlling population growth while causing distress and disruption at the personal level. China formally announced plans to ease the policy in December 2013.
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