GEOG 353 Lecture Notes - Lecture 3: Demographic Transition
Document Summary
Demographic basics: birth/death rate, natural increase, fertility, demography = natural increase and migration. Note: connected to economy: affluence and fertility decline. When fertility rate = 2. 1 then society can replace itself(replacement rate: more than 2. 1: positive increase, less than 2. 1: negative increase. Every 4 years = one year added to your longevity. Net migration: difference between no. of people who enter and no. of people who leave (in a society) Why it is not accurate: birth rates are constantly declining, dtm predicated on the fact than once we reach 2. 1, that is enough, but reality is, there is negative increase. Higher estimates than were provided in 2010. Fertility rate will decline globally: from 3. 0 to 2. 0 (1990-2100) Increased ageing population: 0. 5 bil 3. 2 bil (1990-2100) Large migration trend from africa, moving to places. Ratio of working age to non-working age people.
