2 gravity model spatial attraction depends on not

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Unformatted text preview: t also attraction(size) of the center • Places vary attractiveness by size: the larger, the higher attractiveness • e.g. Power node vs. Regional mall 2.3 Intervening Opportunity Definition: alternative origins and/or destinations that will affect the volume and pattern of customer behavior (movement and flow). 2.4 Range Definition: point at which demand falls to 0 because of travel costs (due to distance decay effect) 2.5 Diffusion Definition: the way that things spread through space and over time relocation diffusion e.g. immigration contagious diffusion phenomenon spread due to the proximity of carriers or agents of change • Example: the spread of idea, disease • similar to hierarchical hierarchical diffusion diffusion process that is hierarchical • e.g. big cities ⇒ small cities 2.6 Demand and Distance: the spatial demand curve The Demand Curve Quantity purchased vs. Price c D. Wang & C.Zhao, 2006 4 2 SPATIAL CONCEPTS & THE VALUE OF GEOGRAPHICAL PERSPECTIVE Cost and Distance Distance vs. Transportation Cost Spatial Price Curve Distance vs. Price to household Spatial Demand Curve 2.7 Distance vs. Quantity purchased per household Accessability and the Value of Location: The Bid-Rent Model (Trade-off Model) • Importance: accessability > land value > land use • spatial sorting of land uses according to ability to pay & costs • logic of these land and economic models: different sites have different accessability and thus vary in value. As land users vary in the level of economic return, they will vary in their ability to pay for the sites. • The most able to gain economically occupy the most accessible (valuable) sites 2.8 The Hotelling Model • competitive: each vendor pushes their location toward the line of indifference (worst case scenario for everyone) – consumers : average distance that need to travel is the highest – for vendors: ↓ number of customers – more likely to get into price war • cooperation: approx. half market each...
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