From conclusion to the Liberty Street post:
In gauging the effects of New York’s escalating minimum wage on two sizable low-wage industry sectors, one growing and the other shrinking, we find that it appears to have had a positive effect on average wages but no discernible effect on employment. It is possible that there was some negative effect on weekly hours worked, though that would imply an even stronger upward effect on hourly wages. However, longer-term effects, if any, remain to be seen. It is certainly conceivable that minimum-wage differentials may affect decisions on firm location, business investment, lease renewal, and the like over a longer time horizon. Moreover, as currently scheduled, the phasing in of the higher minimum wage across upstate New York still has a long way to go. Thus, we will continue to monitor local trends in both employment and wages—particularly in these lower-wage sectors.
I posted this because some are wondering if Card/Krueger diffs-in-diffs approach holds 30 years on. Well, at least in this case it does. Some graphs.