Minimum wage hikes killed jobs during the Great Recession, according to a new working paper published by the National Bureau of Economic Research.

Low-skilled workers were hit especially hard by the minimum wage hikes. For those with less than a high school education, from age 16 to 30, the employment rate dropped by 13 percentage points from 2006 to 2010. The paper estimates that 5.6 percentage points, or 43 percent, of that drop was caused by minimum wage increases.