Basic concepts of demography and population dynamics - Basic concepts of demography and population dynamics Assoc Prof Dr Pradip Sen Gupta Head and

Basic concepts of demography and population dynamics -...

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Basic concepts of demography and population dynamicsAssoc Prof Dr Pradip Sen GuptaHead and Program CoordinatorDepartment of EpidemiologyBangladesh University of Health Sciences
Topics to be coveredDefinition, Role and importance of demographic and population studiesPopulation of Bangladesh overtimeSource of demographic data-Census and surveyVital statistics and other sources especially in Bangladesh, Size, Age – sex compositionPopulation pyramid, Population distribution in space and over timeCommonly used ratios: Sex ratio, child-woman ratio, dependency ratio, density of population.
Definition of demography and population dynamicsDemography derived from Latin word ‘demos’ means people and graphy’ means branch of knowledge regarding a particular science ( in this case, human populations) . Demography is the branch of social sciences concerned with the study of human populations, their structure and change (through births, deaths, and migration), and their relationship with the natural environment and with social and economic change.Demography is the study of human population dynamics. It encompasses the study of the size, structure and distribution of populations, and how populations change over time due to births, deaths, migration, and aging.
Determinants of DemographyThree major factors determine the population dynamics of a population:Births ( fertility)Deaths ( mortality)MigrationIf some groups within a population grow or decline faster than others, the composition of the whole is altered. These three factors determine the most basic characteristics of a population, as well as its demographic future.
Static and Dynamic aspects of demographyStatic aspects of demography include characteristics at a point in time such as composition by:AgeSexRaceMarital statusEconomic characteristics etcDynamic aspects are:FertilityMortalityNuptiality (the frequency or incidence of marriage within a population)MigrationGrowth
Why demography is important?

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