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Thursday, March 28, 2024

The Big Four Economic Indicators: Real Retail Sales and Industrial Production

Courtesy of Doug Short.

Note from dshort: This commentary has been updated to include Real Retail Sales and Industrial Production for July.


Official recession calls are the responsibility of the NBER Business Cycle Dating Committee, which is understandably vague about the specific indicators on which they base their decisions. This committee statement is about as close as they get to identifying their method.

There is, however, a general belief that there are four big indicators that the committee weighs heavily in their cycle identification process. They are:

  • Industrial Production
  • Real Personal Income (excluding Transfer Payments)
  • Nonfarm Employment
  • Real Retail Sales

The Latest Indicator Data

With this morning’s release of the July Consumer Price Index, we can now calculate July Real Retail Sales. I reported the nominal Retail Sales last week, which showed July was flat month-over-month (up 0.04% to two decimal places), down from 0.2% in June. When we adjust for inflation, July sales came in at a -0.05%, a deeper contraction than the previous month’s -0.02%. In fact, when we look at the real sales data, chained in constant July 2014 dollars, we see that this indicator has essentially flatlined since March. This is most volatile of the Big Four indicators, and the recent trend is rather disturbing.

More optimistic, at least on the surface, was last week’s Industrial Production (IP) for July. In the chart of the Big Four since the end of the last recession, this one is the stellar performer, up 24.7% in the headline indicator. In fact, since January 1960, it’s up an incredible 333%. Note, however, that the Fed data from which this index is calculated is not adjusted for inflation.

The thumbnails below give us a side-by-side comparison of the plain vanilla Industrial Production (left) and Real Industrial Production (right), which is adjusted using the Producer Price Index. Click on either for a larger version.

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Let’s go one step further with our IP adjustment. What if we factor in the nation’s population growth? The chart below preserves the latest index reading and adjusts the earlier data points with both the Producer Price Index and the Census Bureau’s mid-month population estimates.

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Anyone who has studied the history of the United States will be aware of our post-WW II structural change from an industrial to a post-industrial economy — one with services, especially financial services, as a key driver.

I will continue to feature the official Industrial Production Index in my Big Four updates. But students of the economy will probably find the real and real-per-capita version to be more accurate snapshots of where we are in this metric.

The chart and table below illustrate the performance of the Big Four with an overlay of a simple average of the four since the end of the Great Recession. The data points show the cumulative percent change from a zero starting point for June 2009. We now have the three indicator updates for the 61th month following the recession. The Big Four Average is (gray line below).

Current Assessment and Outlook

The overall picture of the US economy had been one of a ploddingly slow recovery from the Great Recession with a clearly documented contraction during the winter, as reflected in Q1 GDP. Data for Q2 supported the consensus view that severe winter weather was responsible for the Q1 contraction — that it was not the beginnings of a business cycle decline. However, the average of these indicators in recent months suggests that, despite the Q2 rebound in GDP, the economy is near stall speed.

The next update of the Big Four be the month-end Real Personal Income less Transfer Payments.

Background Analysis: The Big Four Indicators and Recessions

The charts above don’t show us the individual behavior of the Big Four leading up to the 2007 recession. To achieve that goal, I’ve plotted the same data using a “percent off high” technique. In other words, I show successive new highs as zero and the cumulative percent declines of months that aren’t new highs. The advantage of this approach is that it helps us visualize declines more clearly and to compare the depth of declines for each indicator and across time (e.g., the short 2001 recession versus the Great Recession). Here is my own four-pack showing the indicators with this technique.

Click to View

Now let’s examine the behavior of these indicators across time. The first chart below graphs the period from 2000 to the present, thereby showing us the behavior of the four indicators before and after the two most recent recessions. Rather than having four separate charts, I’ve created an overlay to help us evaluate the relative behavior of the indicators at the cycle peaks and troughs. (See my note below on recession boundaries).

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The chart above is an excellent starting point for evaluating the relevance of the four indicators in the context of two very different recessions. In both cases, the bounce in Industrial Production matches the NBER trough while Employment and Personal Incomes lagged in their respective reversals.

As for the start of these two 21st century recessions, the indicator declines are less uniform in their behavior. We can see, however, that Employment and Personal Income were laggards in the declines.

Now let’s look at the 1972-1985 period, which included three recessions — the savage 16-month Oil Embargo recession of 1973-1975 and the double dip of 1980 and 1981-1982 (6-months and 16-months, respectively).

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And finally, for sharp-eyed readers who can don’t mind squinting at a lot of data, here’s a cluttered chart from 1959 to the present. That is the earliest date for which all four indicators are available. The main lesson of this chart is the diverse patterns and volatility across time for these indicators. For example, retail sales and industrial production are far more volatile than employment and income.

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History tells us the brief periods of contraction are not uncommon, as we can see in this big picture since 1959, the same chart as the one above, but showing the average of the four rather than the individual indicators.

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The chart clearly illustrates the savagery of the last recession. It was much deeper than the closest contender in this timeframe, the 1973-1975 Oil Embargo recession. While we’ve yet to set new highs, the trend has collectively been upward, although we have that strange anomaly caused by the late 2012 tax-planning strategy that impacted the Personal Income.

Here is a close-up of the average since 2000.

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Appendix: Chart Gallery with Notes

Each of the four major indicators discussed in this article are illustrated below in three different data manipulations:

  1. A log scale plotting of the data series to ensure that distances on the vertical axis reflect true relative growth. This adjustment is particularly important for data series that have changed significantly over time.
  2. A year-over-year representation to help, among other things, identify broader trends over the years.
  3. A percent-off-high manipulation, which is particularly useful for identifying trend behavior and secular volatility.

Industrial Production

The US Industrial Production Index (INDPRO) is the oldest of the four indicators, stretching back to 1919, although I’ve dropped the earlier decades and started in 1950.

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Real Personal Income Less Transfer Payments

This data series is computed as by taking Personal Income (PI) less Personal Current Transfer Receipts (PCTR) and deflated using the Personal Consumption Expenditure Price Index (PCEPI). I’ve chained the data to the latest price index value.

The “Tax Planning Strategies” annotation refers to shifting income into the current year to avoid a real or expected tax increase.

Click to View
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Click to View
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Transfer Payments largely consist of retirement and disability insurance benefits, medical benefits, income maintenance benefits (more here).

The chart below shows the Transfer Payment portion of Personal Income. I’ve included recessions to help illustrate the impact of the business cycle on this metric.

Total Nonfarm Employees

There are many ways to plot employment. The one referenced by the Federal Reserve researchers as one of the NBER indicators is Total Nonfarm Employees (PAYEMS).

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Real Retail Sales

This indicator is a splicing of the discontinued retail sales series (RETAIL, discontinued in April 2001) with the Retail and Food Services Sales (RSAFS) and deflated by the seasonally adjusted Consumer Price Index (CPIAUCSL). I used a splice point of January 1995 because that date was mentioned in the FRED notes. My experiments with other splice techniques (e.g., 1992, 2001 or using an average of the overlapping years) didn’t make a meaningful difference in the behavior of the indicator in proximity to recessions. I’ve chained the data to the latest CPI value.

Click to View
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Click to View
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Note: I represent recessions as the peak month through the month preceding the trough to highlight the recessions in the charts above. For example, the NBER dates the last cycle peak as December 2007, the trough as June 2009 and the duration as 18 months. The “Peak through the Period preceding the Trough” series is the one FRED uses in its monthly charts, as explained in the FRED FAQs illustrated in this Industrial Production chart.

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