The idea is simple. Every family below a certain income level would be eligible for a housing voucher. They could use that voucher to live anywhere they wanted, just as families can use food stamps to buy groceries virtually anywhere, as long as their housing was neither too expensive, big, and luxurious nor too shabby and run-down. Their home would need to be decent, modest, and fairly priced. Program administrators could develop fine-grained analyses, borrowing from algorithms and other tools commonly used in the private market, to prevent landlords from charging too much and families from
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