The Sector Model is an urban land use theory developed by economist Homer Hoyt in 1939. It suggests that cities grow in a series of sectors or wedges radiating out from the central business district (CBD). Each sector is characterized by different types of land use, such as residential, industrial, or commercial, which develop along transportation routes. According to the Sector Model, as a city expands, certain areas become more desirable for specific activities, leading to the formation of distinct sectors. This model helps urban planners understand patterns of urban growth and the distribution of various land uses within a city.