World Cities, Global Urban Hierarchies, and Distribution Models

Objective and Essential Learning: * Explain how cities embody processes of globalization. * World cities function at the top of the world’s urban hierarchy and drive globalization. * Cities are connected globally by networks and linkages and mediate global processes.
Definition of World Cities: These are large cities that exert global economic, cultural, and political influence. They constitute a network of economic, social, and information flows.
Characteristics of World Cities: * They are globalizing cities situated at the top of the world’s urban hierarchy and are all interconnected. * They serve as media hubs and financial centers. * They contain influential stock exchanges, banks, corporate headquarters, and international organizations. * They are centers for fashion, design, entertainment, and cultural industries.
Global Power City Index (GPCI): * The GPCI ranks the top world cities as measured by their power to attract people, capital, and businesses from around the world. * The index evaluates cities according to six specific functions, which include a city’s economy, culture, and livability.

Interconnection and Globalization: World cities are linked through networks that facilitate the diffusion of new ideas, goods, and services.
Key Sectors of Interconnection: * Manufacturing and Trading * Multinational Corporations * Transportation * Banking * Communication * Popular Culture and Tourism
Specific Examples of Global Connectors: * The Olympics * Fashion Week * Times Square * Buckingham Palace

Objective and Essential Learning: * Identify different urban concepts such as hierarchy, interdependence, relative size, and spacing to explain the distribution, size, and interaction of cities. * Useful principles for explaining these distributions include the rank-size rule, the primate city, gravity, and Christaller’s central place theory.
The Urban Hierarchy System: * Modern cities operate within an interconnected urban hierarchy. * Different cities have different functions within this system. * Larger, more influential cities land higher on the hierarchy. * Cities with smaller populations and smaller economies fall lower on the hierarchy. * Geographers developed models and theories to explain the relative sizes and spatial organization of these cities.

Definition and Model: A model that illustrates the relationship between population distribution in cities that are interconnected in the urban hierarchy.
Indicator of Development: Application of the rank-size rule typically indicates "somewhat even development" within a system.
Mathematical Distribution: * The population of the $2^{nd}$ largest city is equal to $\frac{1}{2}$ the population of the largest city. * The population of the $3^{rd}$ largest city is equal to $\frac{1}{3}$ the population of the largest city. * The population of the $4^{th}$ largest city is equal to $\frac{1}{4}$ the population of the largest city.
Example Scenario: * Largest City: $1,000,000$ population. * $2^{nd}$ Largest City: $500,000$ population. * $3^{rd}$ Largest City: $333,333$ population. * $4^{th}$ Largest City: $250,000$ population.
Caveat: Models are not perfect representations of the real world. There may be variations of the Rank-Size rule when applied to real geographic locations.

Definition and Model: A model that illustrates disproportionate population distribution within a state.
Characteristics: One particular city is extremely large in terms of population size and demonstrates overwhelming economic, cultural, and political influence.
Indicator of Development: This model typically indicates "relatively uneven development" within a state.
Example - France: * Paris: $9,600,000$ population. * Marseilles: $1,300,000$ population.
Example - Mexico: * Mexico City: $21,800,000$ population. * Guadalajara: $5,000,000$ population.

Definition and Model: A model that illustrates the spatial relationship and amount of interaction between locations of different sizes.
Measured Flows: Interaction is measured by flows of people, trade, traffic, and communication.
Factors of Consideration: The model considers the distance between two locations and their relative sizes.
Principles of Interaction: * Larger cities interact more often with other large cities than they do with small cities. * Small cities are drawn to the influence and impact of large cities.
Specific Examples Mentioned: New York City, Indianapolis, and Cincinnati.

Definition and Model: A model that illustrates the hierarchical spatial patterns and order of cities and settlements.
Basis: The theory is based on economic functions and consumer behavior.
The "Central Place": This is the large city that provides the most goods and services for the surrounding areas.
Organization of Settlements: Smaller settlements, including towns, villages, and hamlets, organize themselves around the "central place."
Geometric Representation: The model uses nesting hexagons to ensure that no surface area is left out or overlapped.

Threshold: This is defined as the number of people needed to support a certain good or service.
Range: This is defined as the distance that someone is willing to travel for a good or service.
High-Order Goods and Services: * Characteristics: Expensive, desirable, or unique. * Threshold and Range: Require a large threshold and a large range. * Location: Typically found in higher-order locations, such as major cities. * Examples: Sports arenas, specialty doctors, concerts, and universities. * Contextual Example: There are $9$ museums located in the Cincinnati area.
Low-Order Goods and Services: * Characteristics: Inexpensive, common, and meet everyday needs. * Threshold and Range: Require a smaller threshold and a smaller range. * Location: Typically found in lower-order locations, such as towns, villages, and hamlets. * Examples: Grocery stores, hair salons, barber shops, and gas stations. * Contextual Example: There is an almost perfectly even distribution of Starbucks locations in the Cincinnati area.