sentences:  In modern times, however, this is rarely the case, as many people prefer to trade off the accessibility of being close to the CBD and move to the edges of a settlement, where it is possible to buy more land for the same amount of money (as the bid rent theory states).Likewise, lower-income housing trades off greater living space for increased accessibility to employment.For this reason, low-income housing in many North American cities, for example, is often found in the inner city, and high-income housing is at the edges of the settlement.