The difference between EBIT growth and sales growth (3.6 percent vs. 2.0 percent) can be attributed to an improvement in profit margins. In other words, costs grew at a slower rate than sales. Some of the improvement in profit margins may have come from sourcing cheaper inputs from abroad, enabled by increased globalization. Moreover, for output produced within the U.S., growth in labor productivity—i.e., real output per hour worked—exceeded real wage growth since the mid-2000s.9 This means that, for a given cost of labor, firms were able to produce more output, which would also likely have contributed to the improvement in profit margins.10