Age Structure


Also found in: Encyclopedia.

Age Structure

A characteristic of a population which reflects its historical trends in birth and death rates. Until the 20th century, the human age structure had remained relatively constant and had a pyramidal appearance with a relatively large number of children at the base and, due to a higher average mortality in the 30–50+ group/1000, a narrow apex of persons who made it to old age. With the improving health and decline in both infant mortality and birth rate, the age structure is undergoing a transition, to an increasingly columnar form, especially as developing nations achieve a balanced rate of reproduction.
References in periodicals archive ?
Given this low mortality, due in large part to restrictive regulations, notably the maximum-length limit, the age structure was much greater for this population than any other.
According to the argument of the study, Life Cycle Hypothesis (LCH) is a powerful framework to understand the relationship between age structure and inflation.
Key words: Sex ratios, age structure, several waterfowl species.
Section two talks about demographic dividend in India by analyzing the age structure of the population.
In the analysis of life table, the concept of survival is essential, thus the terms Ex, Tx and Lx express the age structure of population in a given time interval.
Punjab will need to address its extremely youthful age structure and high fertility through investment in development, education, health and family planning strategies, he opined.
In terms of age structure, the report shows that around 30% of farm managers are over 65 and confirms that smaller farms tend to be held by older farmers.
Using 'age-standardized' data -- which predict Alzheimer's rates if all countries had the same population birth rate, life expectancy and age structure -- the study found strong correlations between national sanitation levels and Alzheimer's.
The eEffect of population age structure on economic growth in Iran, Adv.
Using 40 deer per square mile as an example, if EHD/BT strikes and removes 90 percent of the herd, how long will it take, not only to get the herd back to the original density, but also to produce the age structure needed to generate trophy bucks?
Almost a third of passenger cars were 12 years old or moreThe age structure of passenger cars registered in 2012 shows that 31% of passenger cars were 12 years old or more and the fewest (13%) were less than 3 years old.
When developing the most recent long-term national projections of the size of the RN workforce, notable differences in the age structure of the current RN workforce were observed.

Full browser ?