More on recent evidence on the effects of minimum wages in the United States

Table 3 Mean synthetic control weights per county for contiguous and non-contiguous counties, county-level QCEW data, 1990–2006:Q2

	Mean synthetic control weight per contiguous county					Mean synthetic control weight per non-contiguous county
*Matched on:*	*Residual*	*Residual, 0 MW effect*	*Rest. empl. level*	*Rest. empl., 1-quarter diff.*	*Rest. empl., 4-quarter diff.*	*Residual*	*Residual, 0 MW effect*	*Rest. empl. level*	*Rest. empl., 1-quarter diff.*	*Rest. empl., 4-quarter diff.*
*Matched on:*	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
Minimum	0.000	0.000	0.000	0.000	0.000	0.005	0.008	0.007	0.007	0.013
10^th percentile	0.000	0.000	0.000	0.000	0.000	0.019	0.019	0.019	0.019	0.019
25^th percentile	0.002	0.002	0.001	0.002	0.002	0.020	0.020	0.020	0.020	0.020
Median	0.006	0.006	0.006	0.005	0.005	0.020	0.020	0.020	0.020	0.020
75^th percentile	0.011	0.011	0.012	0.010	0.010	0.020	0.020	0.020	0.020	0.020
90^th percentile	0.024	0.024	0.026	0.023	0.019	0.020	0.020	0.020	0.020	0.020
Maximum	0.484	0.493	0.336	0.412	0.219	0.021	0.021	0.021	0.021	0.020
Mean	0.011	0.011	0.012	0.011	0.009	0.020	0.020	0.020	0.020	0.020

Notes: Table reports calculations from synthetic control matching on all minimum wage increases in the sample period. The donor pool used consists of the top 50 counties with the lowest RMSPE from all states other than the treatment state, adding in contiguous cross-border counties if they are not already in this set of 50. The estimates in columns (1), (2), (6), and (7) are based on residuals from panel data estimates of the log of the ratio of restaurant employment to county population on fixed county and period effects and controls for the log of the ratio of aggregate private-sector employment to county population. The log of the minimum wage is included in the regression used in columns (1) and (6). (See NSW, 2014, for more details).