President Obama says there is 'no solid evidence' that so-called minimum wage laws kill jobs, but that's not true.

Another recent study by Shanshan Liu and Thomas Hyclak of Lehigh University, and Krishna Regmi of Georgia College & State University most directly mimics the Dube et al. approach. But crucially it only uses as control areas parts of states that are classified by the Bureau of Economic Analysis as subject to the same economic shocks as the areas where minimum wages have increased. The resulting estimates point to job loss for the least-skilled workers studied, as do a number of other recent studies that address the Dube et al. criticisms.

 We find that a higher minimum wage level is associated with higher earnings, lower employment and reduced worker turnover for those in the 1418 age group. For workers aged 1921 and 2224, we find less consistent evidence of minimum wage effects on earnings and employment. But, even for these age groups, a higher minimum wage is found to reduce accessions, separations and the turnover rate.