Average Nominal Hourly Earnings. An economist is examining wage growth in the United States. She has collected data on average nominal hourly earnings for workers in the United States between 2006 and 2020, which are shown in the following chart (data is also below). Her conclusion is that hourly earnings for workers in the United States have been steadily growing since 2006.

a) How might this conclusion be incorrect? b) How can she modify these data to investigate the appropriateness of this conclusion?

Nominal Earnings in the United States between 2006 and 2020 Average Hourly Earnings ($) 5