As the centerpiece of policymakers' efforts to "deconcentrate" poverty in urban America, the Moving to Opportunity (MTO) project gave roughly 4,600 volunteer families the chance to move out of public housing projects in deeply impoverished neighborhoods in five cities--Baltimore, Boston, Chicago, Los Angeles, and New York. Researchers wanted to find out to what extent moving out of a poor neighborhood into a better-off area would improve the lives...