Two consecutive quarters of falling gross domestic product are often used as shorthand for recession, but the National Bureau of Economic Research does not make its U.S. recession calls by applying that rule alone. Its committee looks for a significant decline in activity that spreads across the economy and lasts more than a few months. The judgment considers depth, diffusion, and duration together, using several indicators because a downturn in one measure or one sector may not describe the whole economy. National Bureau of Economic Research
Three dimensions describe the downturn
The NBER’s definition centers on a significant decline in economic activity that is broad and lasts more than a few months. Its committee treats depth, diffusion, and duration as somewhat interchangeable: each must be present to some degree, but an especially severe showing on one dimension can partly offset weaker evidence on another. National Bureau of Economic Research
That approach makes the familiar two-quarter GDP test an incomplete guide. A hypothetical downturn might include a small dip in output while employment and income remain mixed. The dip would be relevant evidence, but it would not settle whether a significant decline had spread broadly and persisted. Conversely, a very sharp and widespread fall might warrant a recession classification even if it proved brief, as the NBER notes was the case with the 2020 downturn. National Bureau of Economic Research
The committee reads a dashboard, not one gauge
The NBER considers monthly measures of aggregate real activity, including real personal income less transfers, nonfarm payroll employment, household-survey employment, real personal consumption expenditures, manufacturing and trade sales adjusted for price changes, and industrial production. It does not use a fixed formula assigning each measure a predetermined weight. In recent decades, it has given the most weight to real personal income less transfers and nonfarm payroll employment. National Bureau of Economic Research
These indicators capture different parts of everyday economic life. Payroll employment tracks jobs reported by establishments; household employment uses a separate survey. Income less transfers focuses on income generated beyond government transfers, while consumption and sales offer views of spending and business activity. The range helps the committee assess whether weakness reaches households, employers, and production rather than remaining contained in one corner of the economy. National Bureau of Economic Research
Quarterly output adds another perspective
For quarterly turning points, the committee considers measures of aggregate activity over the relevant quarters. Real GDP and gross domestic income, or GDI, are important because they estimate output and income from different sides of the accounts; quarterly averages of monthly indicators, particularly payroll employment, also enter the analysis. National Bureau of Economic Research
GDP itself measures the value of final goods and services produced in the United States. The Bureau of Economic Analysis reports quarterly GDP at annual rates for ease of comparison, and its first, or advance, estimate is an early reading that later estimates revise as additional data arrive. That makes any single GDP release useful but provisional evidence, not an automatic recession verdict. Bureau of Economic Analysis
Retrospective dating waits for enough evidence
The committee dates peaks and troughs after they occur because it waits for enough information to avoid major revisions to the chronology. It seeks confidence that a recession has occurred before naming a peak, and confidence that an expansion is underway before naming a trough. As a result, a turning point can be announced months after the underlying change. National Bureau of Economic Research
This delay reflects the task: identifying when a broad decline began is different from noticing that one quarter’s output fell. Data arrive on different schedules and may be revised, while employment, income, production, and spending can tell different stories at first. The NBER’s retrospective method gives those measures time to clarify whether a decline was deep enough, widespread enough, and persistent enough to mark a business-cycle turn. National Bureau of Economic Research
Sources & further reading
- Business cycle dating ↗National Bureau of Economic Research
- Gross domestic product explained ↗Bureau of Economic Analysis
