Litreviewdraft Essay

3193 Words Mar 18th, 2016 13 Pages
5.5 LITERATURE REVIEW

5.5.1 DEMOGRAPHY DEFINITION
 Thompson (2007) :
“The study of human populations – their size, composition and distribution across place – and the process through which populations change – Births, Deaths and Migration.”
 Weeks (1994) :
“The science of population – concerned with virtually everything that influences, or can be influenced by population size, distribution, processes, structure, or characteristics.”

5.5.1.1 WHY STUDY DEMOGRAPHY


To understand why the populations of some countries are growing and why some are not



What happens to societies as their pattern of birth, death or migration change



Understanding all these consequences of population change (either growth or
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Politicians
-

What their constituents are like, who will vote for them, evaluating issues deemed to be important IV.

Provide insight into the forces of social and economic change

Business and Social Planners

a) Legislators ( future ratio of retirees to wage earners – determining tax rate for old-age insurance) b) Insurance companies – the probability of death before ensuring a life.
c) Building contractors – age and economic status of prospective buyers before can embark on residential developments.
d) Educators – future number of students – in hiring (or firing) faculty and staff
e) Highway engineer – implication of highway project on population of nearby village or town

5.5.2 DEMOGRAPHIC CONCEPTS
 Demography is an interdisciplinary subject
 Used of mathematical concepts – actual or absolute numbers, relative numbers, ratios, rates, proportion, percentage, percent change
 Concepts are useful in demographic analysis – caution is needed in their interpretation

5.5.2.1 POPULATION
I.

The collection of persons alive at a specified point in time who meet certain criteria

II.

Also – refer to a different kind of collectivity, one that persists through time even though its member are continuously changing through attrition and accession

III.

Population in a period of time – de jure population

IV.

Population in a moment of time – de

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