The Lowest Point Isn't the End: Understanding Economic Troughs and Why They Matter

The Lowest Point Isn't the End: Understanding Economic Troughs and Why They Matter

By Bhupendra Thapa

"Every economic downturn tells two stories: one of hardship and another of resilience. The trough is where the first ends and the second quietly begins."

What a trough is

The National Bureau of Economic Research (NBER) defines a recession as a significant decline in economic activity spread across the economy and lasting more than a few months. A trough is the point at which the recession ends and the economy begins an expansion. In its official chronology, the trough month is the final month of the recession.

NBER does not rely on GDP alone to determine these turning points. It examines several indicators, including payroll employment, real personal income excluding government transfer payments, real consumer spending and industrial production. This broader approach helps distinguish a general economic downturn from a temporary decline in one measure of output. The distinction matters because the economy can begin expanding again while many households and businesses are still struggling.

Recessions have generally become shorter

The United States experienced 34 recessions between 1857 and the 2020 downturn in the NBER chronology. Their average duration was 17 months. The figure reflects the exceptionally long contractions of earlier periods, including the 65-month downturn from 1873 to 1879 and the 43-month contraction of the Great Depression from 1929 to 1933.

The historical picture changes after World War II. From 1945 through the 2020 recession, the average contraction lasted approximately 10.3 months. The evidence supports the conclusion that postwar recessions have generally been shorter than those of earlier eras. However, it does not establish that government intervention alone caused the change.

Several explanations deserve consideration. Automatic stabilisers, such as unemployment benefits, can support household spending when incomes fall. Deposit insurance can reduce the risk of bank runs, while monetary and fiscal policies can help limit the damage from some downturns. Changes in the structure of the economy and improvements in economic measurement may also influence the historical comparison. Research by Watson (1994) cautions that differences in how business-cycle turning points were identified can account for part of the apparent stabilisation. Therefore, shorter recessions should be understood as a historical pattern with several possible explanations, rather than the result of one policy change.

A fall in output and a fall in jobs follow different clocks

An economy can begin expanding before employment returns to its previous level. Businesses may initially increase production by using existing staff more intensively, extending working hours or improving productivity. They may delay hiring until they are more confident that demand will continue to grow.

The experience following the 2001 recession illustrates this difference. Although the recession lasted only eight months, total nonfarm payroll employment did not regain its previous peak until February 2005, nearly four years after the employment peak in February 2001. Following the Great Recession, payroll employment continued declining until February 2010, eight months after the official recession trough in June 2009.

These examples show why the end of a recession should not be confused with a complete labour-market recovery. Aggregate economic activity, the number of jobs, wages and individual financial security can recover at different speeds.

Three recessions side by side

Measure	2001 recession	2007–2009 recession	2020 recession
Official duration	8 months	18 months	2 months
Main economic shock	Technology investment slowdown and business retrenchment	Housing collapse, financial stress and credit disruption	COVID-19 pandemic and public-health restrictions
Payroll employment recovery	Previous peak regained in February 2005, about 4 years after the employment peak	Employment continued falling until February 2010; the previous payroll peak was regained in 2014	Aggregate payroll employment returned to its February 2020 level in 2022
Main lesson	Job recovery can lag far behind the recession's end	Financial and labour-market damage can persist for years	A very short recession can still cause a severe, uneven shock

Sources: NBER (n.d.); U.S. Bureau of Labor Statistics (2006, 2014, 2016, 2022).

The comparison reveals why recession duration alone is a poor guide to the recovery that follows. The 2001 downturn was relatively short, yet employment recovered slowly. The Great Recession lasted 18 months and was followed by a prolonged labour-market recovery. The 2020 recession lasted only two months, but the sudden disruption was exceptionally severe. By June 2022, total nonfarm payroll employment remained 524,000 below its February 2020 level, even though private-sector employment had already recovered its net pandemic-related losses. This difference shows why the choice of employment measure matters.

The causes of these recessions also differed. The 2001 downturn was associated with the collapse in technology investment and a wider business slowdown. The Great Recession involved housing-market losses, financial instability and a contraction in credit. In 2020, pandemic restrictions and voluntary changes in behaviour sharply interrupted economic activity. The rapid reopening of many businesses supported a relatively quick aggregate rebound, but it did not eliminate all the lasting consequences for affected workers and industries.

It would therefore be misleading to conclude that the 2020 recession involved little structural damage. Its short official duration reflected the speed of the contraction and the subsequent turning point, not a guarantee that every household or sector recovered quickly. Likewise, the prolonged recovery after 2008 reflected more than the length of the recession itself.

The good news is easy to miss

Expansions have generally lasted much longer than recessions in the postwar United States. According to NBER's chronology, the average expansion from 1945 through the February 2020 peak lasted approximately 64.2 months. The expansion from June 2009 to February 2020 lasted 128 months, making it the longest in the chronology at that time.

These figures offer a useful reminder that economic growth has occupied much more time than contraction in the postwar period. Nevertheless, an expansion does not mean that every household experiences rising income or that every industry benefits equally. Economic growth can coexist with stagnant wages for some workers, regional weakness and unequal access to employment opportunities.

The relevant question is not simply whether the economy is expanding. It is also whether the benefits of that expansion are reaching the people and businesses affected by the previous downturn.

Conclusion

“We’ve hit bottom” is accurate as a description of the business cycle, but it can be misleading when interpreted as a promise that life will soon return to normal. A trough tells us that the recession has ended according to the official chronology. It does not tell us how quickly employment, earnings, business investment or household finances will recover.

Historical evidence shows that a short recession can be followed by years of labour-market adjustment, while a sharp downturn can be followed by a relatively rapid rebound in aggregate activity. The outcome depends partly on what caused the downturn, how businesses and households were affected, and how effectively demand and employment recover.

For that reason, the most useful question after a recession is not only how long it lasted, but what damage it left behind. Recession duration measures the period of contraction; recovery measures how much ground the economy and its people still have to regain. Those are related, but they are not the same.

Sources

National Bureau of Economic Research. (n.d.). Business cycle expansions and contractions. https://www.nber.org/research/data/us-business-cycle-expansions-and-contractions

National Bureau of Economic Research. (n.d.). Business cycle dating procedure: Frequently asked questions. https://www.nber.org/research/business-cycle-dating/business-cycle-dating-procedure-frequently-asked-questions

U.S. Bureau of Labor Statistics. (2006). Payroll employment, 2000–2005. https://www.bls.gov/opub/ted/2006/apr/wk1/art03.htm

U.S. Bureau of Labor Statistics. (2014). Consumer spending and U.S. employment from the 2007–2009 recession through 2022. https://www.bls.gov/opub/mlr/2014/article/consumer-spending-and-us-employment-from-the-recession-through-2022.htm

U.S. Bureau of Labor Statistics. (2016). Current Employment Statistics survey: 100 years of employment, hours, and earnings. https://www.bls.gov/opub/mlr/2016/article/current-employment-statistics-survey-100-years-of-employment-hours-and-earnings.htm

U.S. Bureau of Labor Statistics. (2022). Payroll employment up by 372,000 in June 2022; down by 524,000 since February 2020. https://www.bls.gov/opub/ted/2022/payroll-employment-up-by-372000-in-june-2022-down-by-524000-since-february-2020.htm

Watson, M. W. (1994). Business-cycle durations and postwar stabilization of the U.S. economy. American Economic Review, 84(1), 24–46. https://www.nber.org/papers/w4005