Human Settlements -- Von Thunen and Urbanization in the 1990's

I.  Von Thunen's Agricultural Land Use Model
   A.  Assumptions:
       1.  Isolated State--no other cities
       2.  Single market at center
       3.  Market price, p, same for all producers of a given product
       4.  Featureless plane--uniform soil conditions, equal transport conditions
       5.  Yield per unit acre is the same everywhere
       6.  Transportation costs are proportional to distance and invariant to direction
       7.  Farmers maximize profits
   B.  Symbolic Model
       1.  Non-Spatial economic model:  pi (p,w,r) = pQ - wL - rK
               pi = earnings
               p = profit
               w = wage
               r = capital/rent
               p = price of good
               pQ = revenue
               wL = wage and amount of labor
               rK = capital and amount of ?
       2.  Spatial Economic Model:  LR = pY - cY - Ytd
               LR = Land Rent
               pY = price per unit yield
               cY = cost per unit yield
               Ytd = transport cost /unit yield /distance (this makes the model spatial because cost varies with distance)
II.  Urbanization in the 1990's
   A.  Urban population as a percent of total population
       1.  Low levels in Sub-Saharan Africa
       2.  Variation in urbanization between Southwest and Northwest Africa
       3.  Low urbanization in South Asia
       4.  Singapore is completely urban
       5.  Pacific Rim: South Korea, Japan, Taiwan are highly urbanized
   B.  Distribution of Great World Cities
       1.  Concentrated in Western Europe, North America, and East Asia
       2.  Regional Megalopolis in South Florida
       3.  Urban complex in Germany's Ruhr-Rhine zone
       4.  Randstat in the Netherlands
       5.  Australia--Primacy of the 5 cities
   C.  Megacities
       1.  Many of the largest megacities are in the world's poorest countries
       2.  By 2025, 15 cities will have populations of 20 million
       3.  Stand alonge cities in developing countries
       4.  Conurbations in developed countries
       5.  In 2025, NYC will no longer be one of the top 10 largest cities
       6.  Asia, Africa, South America contain the fastest growing cities
III.  Chicago video