CNN has commentary from Keynesian economist Jeffrey Sachs:
Simply declaring a job to be worth $15 an hour doesn't make it so. A recent careful statistical analysis of Seattle's new minimum wage law (rising in two steps to $11 and then $13 an hour) is sobering.Even an "un-free market" economist understands: the demand for labor is always a downward sloping curve.
The study suggests that Seattle suffered a significant loss of jobs at the bottom end of the wage distribution as a result of the boost in minimum wage.