For anyone interested in some other studies looking at this:
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5197571
First, the policy led to significantly lower turnover in the fast-food sector. Second, wages increased not only for fast-food workers earning below $20, but also for higher-paid workers. Third, although hiring declined following the minimum wage increase, it was outpaced by the decline in turnover, causing total fast-food employment to rise. Fourth, there were no wage or employment spillovers on firms outside the fast-food sector.
The fact that the increase in minimum wage reduced total employment is hardly worth reporting. Higher price (of labor) equals lower quantity demanded. Not a shock, and not really an argument against the policy... because proponents of higher minimum wage aren't arguing the desired outcome is maximizing employment. Do the benefits of the higher wage offset the loss?
I'll happily employ the scholars at WPC $0.01/hour 24/7/365 if they're only interested in maximizing number of hours worked... /s