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Here is a look at two key numbers in the May monthly employment report for April Average Hourly Earnings and Average Weekly Hours. The government has been tracking the data for Production and Nonsupervisory Employees for decades. But coverage of Total Private Employees only dates from March 2006.

Let's look at the broader series, which goes back far enough to show the trend since before the Great Recession. I want to look closely at a five-snapshot sequence.

First, here is a chart of the Average Hourly Earnings. I've included a linear regression through the data to highlight the trend. Hourly earnings increased at a faster pace through 2008, but the pace slowed from early 2009 onward.

(click to enlarge)

But the hourly earnings above are nominal (not adjusted for inflation). Let's look at the same data adjusted for inflation using the Consumer Price Index. Since the government series above is seasonally adjusted, I've used the seasonally adjusted CPI, and I've chained the series to the dollar value of the latest month of hourly wages so that the numbers reflect the purchasing power in today's dollars. As we see, the difference is amazing.

(click to enlarge)

The decline in real wages at the onset of the recession accords with our expectations. But why the rise in the middle of the recession when the Financial Crisis began unfolding in earnest? Let's add another data series to the mix: Average Hours per Week. About eight months into the recession, hours per week began to fall. The number bottomed a few months before the recession ended and then began increasing a few months after it ended.

(click to enlarge)

For a better understanding of the relationship between hourly earnings and the average work week, let's overlay the two. We see a striking inverse correlation during the Financial Crisis. And by the Fall of 2010, the two began to reverse their directions.

(click to enlarge)

The next chart applies some simple math to the two data series. Let's create a snapshot of hypothetical expected real annual earnings: multiply Real Average Hourly Earnings times the Average Hours Per Week and then multiply the weekly earnings times 50 (yes, a couple of weeks of unpaid vacation).

(click to enlarge)

The key word in the chart title is "hypothetical" because among the various factors not included in our calculation is the fact that the employed population is constantly changing, and the rate and types of change accelerate in proximity to recessions. Employees are terminated, shifted to part-time or replaced by part-time employees. During recoveries, new employees are added.

The Great Recession is now well behind us. But the last chart above offers a reminder of the weakness of the recovery 47 months after the recession ended. The latest real annual earnings peaked in September 2010, hit an interim low in August 2011, hit a lower interim high in June of last year and then in October fell slightly below the 2011 low.

In March of this year our real hypothetical earnings hit a new interim high, but the latest data shows some slippage. We're now 0.9% below the all-time real high of September 2010.

Source: Real Hourly Wages And Hours Worked: Monthly Update