Age Structure


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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 ?
The shifts in age structure can be expected to have important effects on both aggregate supply and aggregate demand.
There is no doubt that the changing age structure of our society accounted for a significant part of the crime increase, but considerable doubt that age effects explained most of it.
Contract notice: Determination of groundwater age structure in saarland using isotope physical investigations (groundwater age dating).
It provides information about the size of the fleets of tank wagons in Russia, Ukraine, Kazakhstan and Belarus, the age structure of the fleets of oil and gas tank railroad cars.
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?
Declining in birth rates bring about changes to the population age structure.
Due to its position at the same level of the lake, the archaeologists believe it could be a Stone Age structure.
Under antler restrictions, Pennsylvania was able to change the age structure of its antlered harvest from 80 percent yearling bucks and 20 percent adult bucks to about 55 percent yearling bucks and 45 percent adult bucks.
ISLAMABAD, April 20, 2011 (Balochistan Times): Pakistan needs economic growth to off set the affects of the rising population growth rate and the change in the age structure of its population.
of Western Ontario) and other Canadian sociologists studied whether and how gender and age structure work and influence workplace cultures within small information technology firms.
The study meant to conduct map projection of the future population status for the Omanis according to the age structure till the mid of the current century by using scientific methods and international well-known programme packages in a manner to estimate and meet population needs, availing them and reacting to the change in demographic features of population before reaching these years in a way that serves the strategic interests of the Sultanate.
MacNulty said that number fluctuates based on the age structure of the wolf population at any given time.

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