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Breaking persistent cycles of poverty may seem an impossible task, but the findings of a landmark government social experiment tell a different story.

Back in the mid-1990s, a program called \u201cMoving to Opportunity\u201d gave some families, living in troubled public housing projects in five large cities, vouchers and additional assistance to move away to low-poverty neighborhoods. Lawrence Katz, a professor of economics at Harvard University and the principal investigator of the long-term evaluation of the initiative, explains why the initial results were surprising. He also discusses encouraging new research from an experiment in the Seattle area that helps low-income families move to neighborhoods with better opportunities and outcomes for children.