“Affluent suburbs are particularly likely to hold their status over time...This can be done through high tax rates or by passing zoning regulations that mandate certain size homes and / or large lot sizes. Such practices have the effect of excluding the nonwealthy...Zoning has been used by suburbs since the 1920s as a means of keeping out undesirable activities, housing, and people.” (105)

(Palen, J. John. The Suburbs. New York: McGraw-Hill, 1995. Print.)