Sector model

Proposed in 1939 by economist Homer Hoyt, the sector model in demography modified the concentric zone model of city development. While accepting the existence of a central business district, Hoyt suggested that various groups expand outward from the the city center along railroads, highways, and other transportation arteries. Using Chicago as a model, an upper class residential sector evolved outward along the desireable Lake Michigan coast, while industry extended southward in sectors that followed railroad lines.