Christopher Jencks & Paul E. Peterson 
Urban Underclass [PDF ebook] 

Many believe that the urban underclass in America is a large, rapidly increasing proportion of the population; that crime, teenage pregnancy, and high school dropout rates are escalating; and that welfare rolls are exploding. Yet none of these perceptions is accurate. Here, noted authorities, including William J. Wilson, attempt to separate the truth about poverty, social dislocation, and changes in American family life from the myths that have become part of contemporary folklore.