SOIM-UB 1 Lecture Notes - Lecture 9: Sub-Saharan Africa, Demographic Transition, Infant Mortality

• School: New York University
• Department: Social Impact
• Course: SOIM-UB 1
• Professor: Social Studies

Document Summary

Two useful measures of mortality in addition to the crude death rate already discussed are the infant mortality rate and life expectancy. Infant mortality rate (imr)-the annual number of deaths of infants under one year of age, compared with total live births. Life expectancy- the average number of years a newborn infant can expect to live at current mortality levels. A bar graph representing the distribution of population by age and sex. Population pyramids can be used to demonstrate the demographics of a certain area, and can be used as an indication of the development of a certain area. There are four stages to the demographic transition: All countries are in one stage or another of the demographic transition. Once a country has entered a stage, it cannot go back down to a previous stage. Most of humanity"s several-hundred-thousand-year occupancy of earth was characterized by stage 1 of the demographic transition.