Stockton, CA, gave 125 people $500/month, no strings attached, and here are some of the findings from that:

The researchers Stacia Martin-West of the University of Tennessee and Amy Castro Baker of the University of Pennsylvania collected and analyzed data from individuals who received $500 a month and from individuals who did not. Some of their findings are obvious. The cash transfer reduced income volatility, for one: Households getting the cash saw their month-to-month earnings fluctuate 46 percent, versus the control group’s 68 percent. The families receiving the $500 a month tended to spend the money on essentials, including food, home goods, utilities, and gas. (Less than 1 percent went to cigarettes and alcohol.) The cash also doubled the households’ capacity to pay unexpected bills, and allowed recipient families to pay down their debts. Individuals getting the cash were also better able to help their families and friends, providing financial stability to the broader community…

The researchers also found that the guaranteed income did not dissuade participants from working—adding to a large body of evidence showing that cash benefits do not dramatically shrink the labor force and in some cases help people work by giving them the stability they need to find and take a new job. In the Stockton study, the share of participants with a full-time job rose 12 percentage points, versus five percentage points in the control group. In an interview, Martin-West and Castro Baker suggested that the money created capacity for goal setting, risk taking, and personal investment.

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