Doug Short | Mar 29, 2015 12:28AM ET
Summary: The Sentier Research monthly median household income data series is now available for February. The nominal median household income was up $178 month-over-month and up $1,409 year-over-year. That's a 0.3% MoM gain and 2.7% YoY. Adjusted for inflation, the numbers were up $60 MoM and $1447 YoY. The real numbers equate to a 0.1% monthly increase and a 2.7% yearly increase.
In real dollar terms, the median annual income is 4.5% lower ($2,580) than its interim high in January 2008 but well off its low in August 2011.
Background on Sentier Research
The traditional source of household income data is the Census Bureau, which publishes annual household income data in mid-September for the previous year.
here ). The numbers in their report differ from the Census Bureau's in three key respects:
Monthly Median Household Income Since 2000
The first chart below is an overlay of the nominal values and real monthly values chained in November 2014 dollars. The red line illustrates the history of nominal median household, and the blue line shows the real (inflation-adjusted value). I've added callouts to show specific nominal and real monthly values for January 2000 start date and the peak and post-peak troughs.
Even though there was not a statistically significant increase in median income between January and February, there has been a general upward trend in median income since the low-point reached in August 2011. Our time series charts clearly illustrate that although the economic recovery officially began in June 2009, the recovery in household income did not begin to emerge until after August 2011.
As for the data itself, Sentier makes it available in Excel format for a small fee (here ). I have used the latest data to create a pair of charts illustrating the nominal and real income trends during the 21st century.
The blue line in the chart above paints the less optimistic "real" picture. Since we've chained in latest dollar value and the overall timeframe has been inflationary, the earlier monthly values are adjusted upward accordingly. In addition to the obvious difference in earlier real values, we can also see that real incomes peaked before the nominal (January of 2008, one month after the recession began, versus July 2008). Also the real post-recession decline bottomed later than the nominal (August 2011 versus September 2010).
The next chart is my preferred way to show the nominal and real household income -- the percent change over time. Essentially I have taken the monthly series for both the nominal and real household incomes and divided them by their respective values at the beginning of 2000. The advantage to this approach is that it clearly quantifies the changes in both series and avoids a common distraction of using dollar amounts ("How does my household stack up?").
A Closer Look at the Post-Recession Data
Let's take a closer look at the monthly data since the end of the Great Recession. The adjacent chart highlights the real monthly median values since 2008. The right axis shows the same scale as the chart above -- the percent change from the real household income value at the start of the 21st century. The February 2015 real median annual income is 3.8% below our turn-of-the-century starting point and 4.5% below its interim high in January 2008.
As the excellent data from Sentier Research makes clear, the mainstream U.S. household was struggling before the Great Recession. At this point, real household incomes are in worse shape than they were in mid-2009 when the recession ended.
I'll close this update with another look at real growth, highlighting the actual monthly data points and adding a three-month moving average. The MA trend has been slowly zigzagging higher since the trough in 2011, which illustrates Gordon Green's observations in the latest press release.
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