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Geographic Models

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    Geographic models
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  • What model is this and explain it.
    Demographic Transition Model (Demographic momentum: population continues to grow even after fertility rate decreases)
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  • What model deals with disease vulnerability shifts in the DTM?
    Epidemiological Transition Model (pestilence and famine, disease caused by overcrowding, diseases associated with longer life (cancer)
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  • Explain the gravity model.
    Further away, the weaker the pull (migration). Further away, less likely to interact.
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  • Explain Zelinsky Model of Migration Transition.
    Migration follows DTM stages. More mobile with industrialization. International migration in stage 2 (moving to 3-4). Stage 4 has intraregional, less emigration
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  • Ravenstein's Law of Migration
    Bad things push people out / good things pull people in. Econ (chief reason for migration). Most go short distance. Farther go to cities.Rural move over urban
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  • Explain the Von Thunen model.
    Answers will vary.
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  • Alfred Weber's Least Cost Theory
    Predicts where industries will locate (cost analysis of transport., labor, other factors). Minimize cost and maximize profits
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  • Locational Interdependence
    Hotelling's theory (location choices are influenced by location of chief competitors / related industries
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  • Rostow's States of Economic Development
    All develop in 5 stages. Investment allows nation to grow, which sparks economic gain that diffuses the nation. Based on NA / WEU (drawbacks for world)
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  • What is this?
    Borchert's Model of Urban Evolution
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  • Central Place Theory (Christaller)
    Explains /predicts patterns of urban places. Hexagonal patterns (cities, villages, towns, and hamlets)
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  • Concentric Zone Urban Land Use Model (Burgess Model)
    Explain / predict growth patterns of NA urban areas.As city grows, new rings are added and old ones change (CBD and peak land value)
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  • Bid-Rent Curve
    Variations in rent people are willing to pay for land at different distances from a peak point of accessibility / visibility to the CBD. More distance=less cost
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  • Sector Model (Hoyt)
    NA urban growth patterns. Similar land uses / socioeconomic groups cluster in linear sectors moving outward from a CBD (on transport corridors)
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  • Multiple-Nuclei Model (Chauncy Harris and Edward Ullman)
    Changing growth pattern is based on assumption that growth occurs independently around several major nodes (many are far away from the CBD)
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  • Urban Realms Model (James Vance)
    Explain / predict changing urban growth as cars became more prevalent and large urban "realms" developed (tied to mini-CBDs independent of CBD)
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