Examlex
The majority of Americans today define themselves as middle class,regardless of their actual income or educational attainment.
Total Fertility Rate
The average number of children that would be born to a woman over her lifetime based on current age-specific fertility rates.
Replacement Rate
The proportion of an individual's pre-retirement income that is paid out by a pension program upon retirement.
Demographic Transition
A model that describes the transformation of countries from having high birth and death rates to low birth and death rates as a society progresses economically and socially.
World Population
The total number of living humans on Earth at a given time, which affects resource demand, environmental sustainability, and global policies.
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