Jane Jacobs Conditions for Diversity

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  • Jane Jacob's Conditions for City Diversity
    • Primary Mixed Uses
      • A city must serve more than 1 primary function
      • People are outside at different times and on different schedules
        • This is economically beneficial because if businesses are empty during certain times they will not be profitable
        • In lower Manhattan small businesses close because they are packed at lunch breaks and empty and most other times
      • While primary uses are mixed, people are able to use common facilities
      • This could not be achieved by creating more residences
    • Small Blocks
      • Streets and opportunities to turn corners must be frequent
      • Increased opportunity for commerce
      • Increased convenience for residents
      • Meet more people and network better. See more of life
    • Aged Buildings
      • Mingle buildings that vary in age and condition, including considerable amount of old ones
      • Only new buildings limit the enterprises that can support the high costs of new construction
      • Many places have no need for new construction, so when it is built it becomes ghettoised
      • Brooklyn has more old buildings than it needs where Stuyvesant Town has too many new buildings. Both are in decline
    • Concentration
      • There must be sufficient urban density
      • Economically, creates large markets, encourages knowledge spill overs
      • There is an optimum level of density, but no sufficient level
      • Slums and density are not necessarily linked. Poverty and slums are linked.


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