A vast literature in economics has examined the economic progress of African Americans during this century. Most of these studies have focused on income--or on even narrower measures of economic well-being, such as earnings--to assess the extent to which any gains made relative to other racial...

During the 1980s, wage inequality increased dramatically and the American economy lost many high wage, low- to medium-skill jobs, which had provided middle class incomes to less skilled workers. Increasingly, less skilled workers seemed restricted to low wage jobs lacking union or other...