GEOG 1HB3 Lecture Notes - Lecture 10: Demographic Transition, Agricultural Productivity, Hedeby Stones
18 Dec 2017
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Document Summary
Globally, population is understood with reference to two factors: fertility (births) & B = number of people born since last year. D = number of people who have died since last year. Regionally though, population is also influenced by population movement: migration (immigration & emigration) I = immigration: people entering the country. E = emigration: people leaving the country. P1 = p0 + (b-d) + (i-e) Fertility: measures and factors: crude birth rate (cbr): cbr = (b/p) x 1000. Total number of live births per year for every 1000 people already living. The number of women in the population, and. The number of women of childbearing age (i. e. 15-49: general fertility rate (or fecundity) (gfr): gfr = (b/pf-15-49) x 1000, total fertility rate (tfr): The average number of children a woman will have in her fecund years (15-49) i. ii. Global tfr = 2. 5 (2015); mdw = <2. 0 & ldw = >2. 0. Many factors influence the rates of fertility.
