By Jennifer Ludden, NPR

The Department of Housing and Urban Development is exploring the idea of giving struggling Americans cash aid instead of vouchers. That might seem like an unlikely, bold new move for the federal housing agency — except it turns out that back in the 1970s, HUD was already testing the idea.

Before the cash-aid results were even in, however, HUD launched its voucher program that now serves millions of people. A few years ago, a HUD employee came across the reports from its 1970s tests and wondered whether the idea was worth a new look.

“It’s taken us 50 years to come back to it and really experiment with it once again,” says Solomon Greene, who helps develop policy at HUD.

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