DEMOGRAPHY MATH - DEMOGRAPHY MATH Dr Muhammad Tareque Hasan Teaching Assistance Department Of Epidemiology BUHS 1 The Basic Demographic Equation\/The

DEMOGRAPHY MATH - DEMOGRAPHY MATH Dr Muhammad Tareque Hasan...

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DEMOGRAPHY MATH Dr. Muhammad Tareque Hasan Teaching Assistance Department Of Epidemiology BUHS 1
The Basic Demographic Equation/The Balancing Equation One of the most fundamental relationship in demography P t =P 0 +B-D+IN-OUT Where, P t =population at the end of the period P 0 =population at the beginning of the period B =births D =deaths IN=In migration OUT=Out migration P t =P 0 +B-D+IN-OUT -the difference between the numbers of births and deaths gives the ‘natural increase’ -the difference between the numbers of migrants in and out gives the ‘net migration’ Population change=Natural increase+ Net migration Net Migration= In Migration-Out Migration 2
Three Key Features of Populations 1. Size: number of individuals in an area Growth Rate: Birth Rate (natality) - Death Rate (mortality) How many individuals are born vs. how many die Birth rate ( b ) − death rate ( d ) = rate of natural increase ( r ). 3
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