SOC 134 Lecture Notes - Lecture 1: Zero Population Growth, Total Fertility Rate, Demographic Transition
4 Nov 2016
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Document Summary
Demographic transition : stage of societal development in less developed countries marked by growing life expectancy and high birth rates. Explains why populations in less-developed countries grow faster than those in more developed countries. Most worldwide population growth has happened in the last 200 years. U. n projected projected stabilization at 9 billion around 2050. Almost all population growth will take place in less developed countries. Total fertility rate = average number of children have in a country. Natural sex ratio at birth is 105 males 100 females. Nations with older populations have fewer men than women because women live longer. Many more boys than girls are born because of sex selective abortion. Most abortions follow the birth of one or two girls. Heightening competition among men to find wives, many can"t marry at all. Birth cohort: set of people who were born during a particular time period. Thinking about different cohorts requires understanding of two different demographic efforts.
