Three years ago, the city of Seattle voted to gradually raise its minimum wage to $15 an hour in the name of human decency and basic fairness. Several cities, including New York and Los Angeles, have done the same thing. Critics argue that boosting wages by bureaucratic diktat leads to fewer hours and jobs for low-income and low-skilled workers.

Now what The Washington Post calls a "very credible" study from researchers at the University of Washington finds that the critics are right. The Post calls this bad news for liberals. But the real victims are low-skilled workers.