Percent of people in a country who can read and write. It indicates quality of education which correlates to economic output (well educated = higher wages)
is a composite statistic of life expectancy, education, and per capita income indicators, which are used to rank countries into four tiers of human development.
What is stage 3 of the demographic transition model?
As life becomes safer and people earn more money, people decide to have children. This increases population. Improving hospitals further decrease infant mortality.