Important Models and Theories

  1. Demographic Transition Model (DTM): Describes the transition from high birth and death rates to low birth and death rates as a country develops.

    • Stage 2: High birth rates, declining death rates (Early industrial)

    • Stage 3: Declining birth rates, low death rates (Mature industrial)

    • Stage 4: Low birth and death rates (Post-industrial)

    • Stage 5: Potential for population decline (Some developed countries)

  3. Malthusian Theory: Argues that population growth will outpace food production, leading to famine, disease, and war.

    • Neo-Malthusian Theory: Adds the idea that environmental degradation could worsen these problems.

  5. Rostow’s Stages of Economic Growth: A theory of economic development that describes five stages:

    • Stage 1: Traditional society

    • Stage 2: Pre-conditions for takeoff

    • Stage 3: Takeoff

    • Stage 4: Drive to maturity

    • Stage 5: Age of high mass consumption

  7. World Systems Theory (Immanuel Wallerstein): Suggests that countries are either core, semi-peripheral, or peripheral in the global economy based on their role in economic production.

    • Core: Wealthy, economically dominant countries.

    • Peripheral: Countries that are dependent on core countries for economic growth.

    • Semi-peripheral: Countries that are intermediate between core and peripheral.

  9. Central Place Theory (Christaller): Explains the distribution of cities based on the idea that there is a hierarchy of central places that serve surrounding areas.

    • Higher-order goods: Expensive items available in fewer places.

    • Lower-order goods: Everyday items available everywhere.

  11. Von Thünen’s Model of Agricultural Land Use: Describes how different types of farming occur at different distances from a central market.

    • Closest to the market: Perishable goods (e.g., dairy, vegetables).

    • Further away: Grain farming, livestock.

  13. Centripetal vs. Centrifugal Forces:

    • Centripetal Forces: Forces that unify a country (e.g., a common language, national pride).

    • Centrifugal Forces: Forces that divide a country (e.g., ethnic or religious divisions).

  15. Urban Models:

    • Concentric Zone Model (Burgess): Describes urban land use in concentric rings around the city center.

    • Sector Model (Hoyt): Explains how cities develop in sectors, or wedges, emanating from the central business district.

    • Multiple Nuclei Model (Harris & Ullman): Suggests that cities develop around multiple centers or nodes, not just one central area.