Population (Copy)

5.3 Population

5.3.1 Factors That Affect Population Growth

• Birth Rate
  • Number of live births per 1000 people per year.
  • High birth rate increases population growth.
  • Influenced by fertility rate, cultural/religious beliefs, healthcare, availability of contraception.
• Death Rate
  • Number of deaths per 1000 people per year.
  • High death rate decreases population growth.
  • Influenced by healthcare quality, nutrition, wars, diseases.
• Net Migration
  • Difference between immigration (entering a country) and emigration (leaving a country).
  • Immigration → increases population.
  • Emigration → decreases population.

5.3.2 Reasons for Different Rates of Population Growth in Different Countries

• Developing Countries (higher growth rates):
  • High birth rates due to lack of contraception, cultural norms, agricultural dependence.
  • Falling death rates due to improvements in healthcare and sanitation.
  • Younger population structures.
• Developed Countries (lower or negative growth rates):
  • Low birth rates due to family planning, higher female education, career opportunities, urban lifestyles.
  • Aging populations with higher life expectancy.
  • Net migration patterns influence population growth (e.g., immigration boosts growth).

Written and Compiled By Sir Hunain Zia, World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Economics Full Scale Course

5.3.3 Effects of Changes in the Size and Structure of Population on Different Countries

• Optimum Population Concept
  • The ideal population size where resources are used most efficiently, maximizing output per head.
  • Overpopulation: Too many people relative to resources, leading to unemployment, poverty, congestion.
  • Underpopulation: Too few people to fully use resources, leading to labor shortages and reduced output.
• Effects of Increasing Population Size
  • Higher demand for goods/services, possible economic growth.
  • Pressure on healthcare, education, housing, infrastructure.
  • Higher unemployment if job creation lags.
• Effects of Decreasing Population Size
  • Aging population leading to higher dependency ratio.
  • Fewer workers → reduced economic growth potential.
  • Strain on government budgets due to pensions and healthcare spending.
• Changes in Age Distribution
  • Youthful Population: High dependency ratio, need for more schools and childcare services.
  • Aging Population: Greater demand for healthcare, pensions, fewer workers in labor force.
• Changes in Gender Distribution
  • More women in the labor force → boosts productivity, reduces dependency.
  • Imbalance (e.g., due to migration or cultural practices) can affect marriage rates and social stability.
• Population Pyramids (interpretation only)
  • Broad base → high birth rates.
  • Narrow top → low life expectancy.
  • Rectangular shape → stable population with low birth and death rates.

Written and Compiled By Sir Hunain Zia, World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Economics Full Scale Course