There are several findings in this paper. First, the impact of minimum wage hikes on output prices (more precisely, on the FAFH CPI) is substantially smaller than previously reported. Whereas the commonly accepted elasticity of prices to minimum wage changes is 0.07, we find a value almost half of that, 0.036. Importantly, the value we found, 0.036, falls far short of what would be expected if low-wage labor markets are perfectly competitive. Second, increases in prices following minimum wage hikes generally occur in the month the minimum wage hike is implemented (and not in the month before or the month after). Previous research has reported notable increases in prices the month before and the month after, but we present evidence that such a finding was likely an artifact of interpolation.
Third, the effects of federal, state, and city minimum wages on prices are not necessarily the same: the size of the effect, along with when the price effect occurs, can potentially change for these different types of minimum wage policies. Fourth, small minimum wage hikes do not lead to higher prices, and they might actually lead to lower prices. On the other hand, large minimum wage hikes have clear positive effects on output prices. Such a finding about the different effect of small and of large minimum wage hikes is consistent with the claim that lowwage labor markets are monopsonistically competitive. If such labor markets are indeed monopsonistically competitive, then small increases in minimum wages might lead to increased employment. Our study of restaurant pricing, then, indirectly addresses one of the more contentious issues associated with the employment impact of minimum wage hikes. Fifth, we find no evidence suggesting that exit of restaurants fleeing state minimum wage hikes is large enough to affect output prices.
Finally, we find evidence that the particulars of a minimum wage policy (indexed, oneshot, scheduled) might affect how price changes occur within the relevant area. These results can be used to design future minimum wage policies that best temper the pass-through effect.