GEOG 1035 Lecture Notes - Lecture 3: Migration Period, Fecundity, Demographic Transition

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13 Jan 2017
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2017: more people will be 70 years old than ever. Crude birth rate (cbr)/crude death rate (cdr: = live births (deaths) in one year x 1000/mid-year population. Infant mortality rate = under 1 year of age. Nuptuality rate = marriages in one year x 1000/mid-year population. General fertilty rate = number of live births in year (x1000)/mid-year number of females 15-49. Fecundity = 15 to 49, in general ability to conceive years old. Tfr = sum age specific fertility rate * number of cohorts (ex. Replacement level: tfr is at 2. 1 or higher, then populations can be replaced and remain at the same number or grow. This is the fact for most of the developing/emerging world. If tfr is below 2. 1, then populations can not replace and growth will cease and the area will decrease in size - at least in terms of natural size which exclude migration.

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