Population Pyramids

Population Pyramids

• we use population pyramids to analyze growth ( or decline) of fertility, morality, and migration in cities (males are always on the left of the pyramid and women are on the right)
• three basic shapes

- Christmas tree-- developing nation growth rates are slow; high birth rate, short life expectancy; ex: Namibia
- The box-- slow growth, low infant mortality, slow population growth, and long life expectancy; ex: USA; Sweden
- The cup-- developing nation; negative growth, low birth rate, shrinking population, long life expectancy; ex: Italy; Japan