Ebenezer Howard's 1898 work contrasted rural and urban life, proposing "Garden Cities" that incorporated the best of both, such as Letchworth (1903) and Welwyn Garden City (1920). While well-intentioned, garden cities often functioned merely as dormitories for larger cities and did not fully achieve their egalitarian vision. Bid rent theory shows how much different sectors are willing to pay for land in various locations, with retail highest in the city center and residential uses on the outskirts. Variations of this model account for factors like transportation intersections and suburban centers.