Ortmodellen

Ortmodellen, also known as the Location Model, is a theoretical framework used in urban planning and geography to understand the spatial distribution of economic activities and land use. It seeks to explain why businesses and residential areas locate where they do, considering factors such as accessibility, costs, and agglomeration economies. The model is based on the idea that firms will choose locations that minimize their costs, particularly transportation costs, and maximize their profits.

Key to Ortmodellen is the concept of the bid-rent curve. This curve illustrates the maximum rent a firm or household is willing to pay for a piece of land at a given distance from a central business district or other key location. Firms with higher transportation costs or those that benefit more from proximity to the center will have steeper bid-rent curves, leading them to locate closer to the center. Conversely, firms with lower transportation costs or those that can find cheaper land further out will have flatter bid-rent curves, allowing them to locate in more peripheral areas.

Ortmodellen helps to explain the concentric ring model of urban development, where different land uses are organized in rings around a central business district. For instance, retail and commercial activities, which benefit most from central locations and have high revenue-generating potential, tend to occupy the innermost ring. Industrial areas, often requiring more space and generating less central-oriented revenue, are typically found further out. Residential areas then occupy the outermost rings, with housing prices often decreasing with distance from the center due to lower land values and increased commuting costs. While a simplification of complex urban dynamics, Ortmodellen provides a foundational understanding of locational decision-making.