From ABC News:
David Neumark, an economics professor at the University of California, Irvine, says an increase from $10 to $15 by 2022 would reduce employment among the least-skilled workers by at least 5 to 10 percent. Neumark says that the effects would vary by geography. In high-wage counties such as San Francisco and Santa Clara, about 22 percent of workers would get a raise. In places such as Fresno and Merced counties, about half the workers would.

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