Absolute counts of deaths (by age, year of death, and year of birth)
Population size
. .
Figures on populations exposed to the risk of death (for periods and cohorts)
Death rates (for periods and cohorts)
What are the rates in vital statistics?
Principal among vital rates are the crude birth rate and the crude death rate; i.e., annual numbers of births or of deaths per 1,000 population, based on the midyear population estimate. The difference between these two rates is the rate of natural increase (or decrease, if deaths exceed births)..
What is the difference between rate and ratio in demography?
Definition A rate measures the occurrence of some particular event in a population during a given time period. E.g. Births, Deaths, Diseases etc. A ratio is a measure of events which expresses a relation in size between two different factors occurring in the population..
The most commonly used ratio in demography is the sex ratio, which describes the number of men relative to the number of women (i.e. number of men divided by the number of women). This can be done for the whole population, but is more commonly calculated for specific age groups.
The term rate is very widely used, but some indices called rates in demography are in fact ratios, proportions, or more complex measures. Strictly speaking, a rate is a measure of change in a population over a specified time period (usually a year).
What is a demographic rate?
A demographic rate expresses the number of events occurring relative to person years at risk of the event in a defined population for a specified time and place
It may be expressed per person year, per 1,000 person years, per 100,000 person years at risk, and so on
What is proportion in demographics?
A proportion is defined in the usual way, as the number with a given attribute at a given time point divided by the total population in question at that time
Finally, demographic measures also take the form of ratios, for example, the sex ratio at birth is the ratio of the numbers of male to female births
The term rate is very widely used, but some indices called rates in demography are in fact ratios, proportions, or more complex measures. Strictly speaking, a rate is a measure of change in a population over a specified time period (usually a year).Rate measures the occurrence of some particular event in a population during a given period of time. It indicates the change in some event that take place in a population over a period of time like death rate or birth rate.A ratio is a relationship between two numbers indicating how many times the first number contains the second.
What is rate in demography
Difference between the number of immigrants and emigrants divided by population
The net migration rate is the difference between the number of immigrants and the number of emigrants divided by the population. When the number of immigrants is larger than the number of emigrants, a positive net migration rate occurs. A positive net migration rate indicates that there are more people entering than leaving an area. When more emigrate from a country, the result is a negative net migration rate, meaning that more people are leaving than entering the area. When there is an equal number of immigrants and emigrants, the net migration rate is balanced.
