nine tracts.
Still, Jargowsky takes encouragement from declining concentrations in such areas as New York City, Newark, N.J., and Tampa-St. Pe- tersburg. The drops are the product of im- proved local economies, Jargowsky believes, and show that the vision of the black poor as totally alienated and indifferent to opportunity is wrong. If the economy is strong, many poor people will work their way out of the ghettos.

A University's Decline and Fall
'Downward Mobility: The Failure of Open Admissions a...