"The distance between my house and yours is a separation the suburb's designers carefully planned. It is one of the principal factors in determining the number of houses per acre in a subdivision.
The number of houses per acre is the subdivision's yield. This is a measure of its profitability, which is not the number of houses that can be sold, but the subdivisions' population density.
Density is what developers sell to the builders of shopping centers."
D. J. Waldie
Holy Land, a Suburban Memoir