{ "id": "recession", "title": "Recession", "lang": "en", "source_lang": "en", "summary": "A recession is a significant, widespread, and lasting decline in economic activity, usually the contraction phase of the business cycle.", "category": "economics", "subcategory": "macroeconomics", "type": "concept", "aliases": [ "Economic recession", "Economic downturn", "Business-cycle contraction" ], "generated_at": "2026-10-08", "model": "pro/claude-haiku-5-5", "url": "https://aiwiki.page/en/recession/", "translations": { "zh-Hans": { "url": "https://aiwiki.page/zh/recession/", "json": "https://aiwiki.page/zh/recession.json" } }, "sections": [ { "heading": "", "text": "A recession is a significant decline in economic activity that spreads across much of an economy and lasts longer than a few months. In the business cycle, it is the phase between a peak and a trough, following the expansion that ends at the peak and preceding the expansion that starts at the trough. Recessions are measured through output, income, employment, and spending, and they are central to economics and macroeconomics because they show how an economy can move from growth to shrinkage and back again.\n\nRecessions matter because they reduce output, raise unemployment, and lower household incomes, often for years in the worst cases. They also shape the decisions of central banks and governments, which use monetary and fiscal tools to shorten downturns. The concept is contested in practice: the popular \"two consecutive quarters of falling GDP\" rule of thumb differs from the broader criteria used by official dating bodies, and recessions are usually recognized only after they have begun.\n\nThis entry first sets out how recessions are defined and dated, then explains the business cycle, the causes and financial channels through which downturns spread, and the indicators used to track them. It then reviews major historical episodes, their social and economic consequences, the policy responses and the theories that explain them, and finally the question of terminology and international differences." }, { "heading": "Definition and dating criteria", "text": "The NBER standard\n\nIn the United States, the authoritative chronology is kept by the Business Cycle Dating Committee of the National Bureau of Economic Research, a committee of academic economists convened under the NBER, a private nonprofit research organisation based in Cambridge, Massachusetts. Its traditional test treats a recession as a material slump that reaches many parts of the economy and does not disappear within a few months (the committee's own wording describes a significant decline spread across the economy that lasts more than a few months). The committee does not apply the three parts of this test mechanically. It asks whether depth, diffusion, and duration are each present to some degree, and an extreme reading on one can make up for a weaker reading on another. The 2020 downturn shows why. It was very brief, yet the committee judged its unprecedented magnitude of the decline in employment and production, and its broad reach across the entire economy, sufficient to warrant a recession designation.\n\nThe two-quarter shortcut\n\nOutside official circles, the most common rule of thumb is that two consecutive quarters of decline in a country's real (inflation-adjusted) gross domestic product signal a recession. The rule is often traced to economist Julius Shiskin, who proposed it in a 1974 newspaper article as one of several quantitative tests (the attribution is \"sometimes\" made, so it should be treated as tentative). The NBER does not use it as its standard. Most NBER recessions do include two or more quarters of falling real GDP, but not all of them. The 2001 episode is the standard counterexample: the NBER declared a recession lasting from March to November, but real GDP fell in only one quarter, not two consecutively. The reverse also occurs. Two negative quarters without an NBER recession, is rarer but happened in 2022. The committee gives reasons for not relying on GDP alone, including the fact that there also can be measurement errors in GDP calculations.\n\nThe activity measures\n\nThe committee does not adopt a single fixed measure of activity. It examines and compares the behavior of various measures of broad activity: real GDP measured on the product and income sides, economy-wide employment, and real income. Its monthly work draws on a longer list that includes real personal income less transfers, nonfarm payroll employment, real consumer spending, manufacturing and trade sales adjusted for prices, household-survey employment, and industrial production. Narrower series such as real sales and the Federal Reserve's index of industrial production are considered as well. Using these alongside the broad totals recognizes the issue of double-counting of sectors included in both those indicators and the broad measures. The weighting can produce results that differ from GDP. In 2007–2008, for example, the NBER dated the start of the recession to December 2007 even though GDP actually rose slightly into early 2008, but employment peaked in December 2007, which, among other factors, helped guide the NBER's evaluation.\n\nDating conventions\n\nBecause the committee works in months, a turning point is a monthly event. A peak is the month in which a variety of economic indicators reach their highest level, followed by a significant decline in economic activity. A trough is the low point after which activity rises again and keeps rising for a sustained period. By convention, the NBER classifies the peak month as the last month of the expansion and the trough month as the last month of the recession. A recession therefore begins in the month after the peak and runs through the trough month. The 2020 episode had a peak in February and a trough in April, which made it a two-month recession, the shortest US recession on record.\n\nDouble-dip downturns, in which a recovery is followed by a second decline, are handled as a judgment about whether the interval was a true expansion. The 1980 recession, which ran for about six months in the first half of 1980, was followed by a separate recession from 1981 to 1982. Economist James Poterba, who later served as NBER president, has noted that a period of alternating sharp quarterly declines and very modest upturns, however, would not meet the 'two-quarter' test, but might represent a significant and long-lasting decline in economic activity. The committee therefore weighs how far activity recovers between the two troughs and peaks rather than applying a fixed gap rule." }, { "heading": "The business cycle and its phases", "text": "Four phases and alternating turning points\n\nEconomic activity is usually described as passing through four phases: expansion, peak, contraction, and trough. The phases are linked by turning points. The NBER's Business Cycle Dating Committee maintains a chronology of U.S. cycles that comprises alternating dates of peaks and troughs in economic activity. The interval from a trough to the next peak is an expansion, and the interval from a peak to the following trough is a recession (a recession is a period between a peak and a trough, and an expansion is a period between a trough and a peak). The convention for months is that the peak month is classified as the last month of the expansion and the trough month as the last month of the recession. A recession therefore begins in the month after the peak and ends in the trough month, and the peak and trough are single dated months rather than long phases in their own right.\n\nOrigins in the work of Burns and Mitchell\n\nThe modern vocabulary grew out of the empirical work of Wesley Mitchell and Arthur Burns. Mitchell's 1927 study was the first major instalment of Mitchell's investigation into business cycles, and it tied theory to a large body of observation. Business cycles as we know them today were codified and analyzed by Arthur Burns and Wesley Mitchell in their 1946 book Measuring Business Cycles. Their central finding was that many indicators move together over the cycle: during an expansion, not only does output rise, but also employment rises and unemployment falls. To date the turns, they considered the historical concordance of hundreds of series, including those measuring commodity output, income, prices, interest rates, banking transactions, and transportation services. They used the clusters of turning points in these individual series to determine the monthly dates of the turning points in the overall business cycle.\n\nTheir 1946 summary definition described cycles as expansions occurring together across many activities, followed by similarly general recessions, contractions, and revivals, with the sequence recurring irregularly rather than on a fixed schedule. Burns and Mitchell did not regard their reference dates as final. Romer notes that the dates were originally fixed in something of a hurry, and that the authors themselves called for a thorough later review. The dates nonetheless shaped the concept. As Romer argues, they played an important role in establishing the concept of a recession as a repeated, identifiable phenomenon. They showed that periods of normal growth or expansion were routinely interrupted by an abrupt decline in economic activity.\n\nAsymmetry of expansions and recessions\n\nExpansion is the normal condition of a market economy. The NBER notes that expansion is the normal state of the economy; most recessions are brief. Postwar averages illustrate the gap: one summary of NBER dating gives roughly 64.2 months for expansions, 10.3 months for contractions, although such averages mask the enormous variability between individual cycles. Brevity of the downturn itself does not mean a quick recovery. The NBER points out that the time that it takes for the economy to return to its previous peak level of activity or its previous trend path may be quite extended. A recession can therefore be short in dating terms while leaving output and employment well below trend for years.\n\nTerminology: contraction, recession, and informal usage\n\nIn NBER usage the two words describe the same interval. A contraction and a recession are effectively the same thing: the contraction phase is the recession — the period from a business cycle peak to the subsequent trough. The NBER's recession is more than a fall in one indicator. It is a significant decline in economic activity that is spread across the economy and lasts more than a few months. The committee treats depth, diffusion, and duration as partly interchangeable: while each criterion needs to be met individually to some degree, extreme conditions revealed by one criterion may partially offset weaker indications from another.\n\nIn everyday and journalistic speech, \"contraction\" often means simply a quarter of negative real output growth. That usage differs from the NBER sense. A single negative quarter is not necessarily a dated contraction, and a dated contraction can include quarters of positive growth. The distinction matters for reading headlines, and the rule of thumb that is often applied to quarterly GDP is discussed in the GDP and definition sections of this entry." }, { "heading": "Causes and transmission mechanisms", "text": "Recessions rarely have a single origin, but economists group their triggers into a few families. The most common is a negative demand shock: a sudden drop in household consumption, business investment, government spending, or net exports leaves firms with unsold output. Financial crises are another frequent trigger because they abruptly tighten the supply of credit, a link treated in the financial section. Sharp monetary tightening is a third. When a central bank raises policy rates to restrain inflation, borrowing becomes more expensive and interest-sensitive spending falls, and these effects arrive after long and variable lags. Supply shocks, such as a spike in oil prices, raise production costs and squeeze real incomes even when demand is not weakening, which can produce stagflation as in the 1970s. The collapse of an asset bubble is a fifth trigger: when share prices or house prices fall sharply, household and corporate wealth is destroyed, and spending tends to stay depressed for some time afterward.\n\nBusiness investment is usually the first channel through which these shocks reach the real economy, and it is the most volatile component of output. Firms facing weaker sales, tighter credit, or greater uncertainty postpone purchases of equipment, structures, and software, and they run down inventories rather than reorder them. Because of the accelerator principle, investment depends on the change in output rather than its level, so a modest slowdown in sales can cut demand for new capital goods sharply. Inventory destocking adds to the drop in measured output in the early stage of a downturn, while delayed capital spending can keep the recovery slow even after demand begins to stabilize.\n\nThe household channel works in a similar way but through different categories of spending. Housing construction and purchases of durable goods such as cars and appliances are highly sensitive to income, borrowing costs, and confidence, and they can be deferred for long periods. Spending on services and non-durable goods typically moves much less. When job insecurity rises, households increase precautionary saving, which reduces consumption even among families who remain employed. Falling house prices can compound the effect by reducing the value of assets that households use to support borrowing, although the wider balance-sheet dynamics are discussed in the financial section.\n\nThe most important feature of these mechanisms is that the initial shock rarely stays contained. A fall in demand leads firms to cut output and hire less. Layoffs and shorter hours reduce the incomes of workers, who in turn spend less, and weaker sales for retailers and suppliers prompt further cuts upstream. Because modern production is organized in long value chains, the downturn can spread across sectors and regions, and pessimism about future sales can become self-fulfilling as firms and consumers defer decisions together. Whether a given shock grows into a recession therefore depends heavily on how strongly these feedback loops amplify it, a question that also lies at the heart of the debate between shock-driven and propagation-driven accounts of the cycle described in the theories section. Policy responses to these dynamics are considered later in this entry." }, { "heading": "Financial crises and the credit channel", "text": "Recessions that begin with a financial crisis differ from ordinary cyclical downturns mainly in how they reduce spending. In a typical recession, demand falls because firms and households decide to cut back. In a financial crisis, the same decisions are often forced by the loss of access to credit. Firms and households may remain solvent, with more assets than debts, and still be unable to borrow on workable terms. The result is that a shock to the financial system spreads into the real economy through the cost and availability of credit.\n\nRuns, frozen markets and credit rationing\n\nThe most acute mechanism is a run. Depositors who fear losses withdraw funds, and banks that hold long-term loans against short-term funding must sell assets quickly or fail. Ben Bernanke's account of 2007–2009 stresses that the panic was not confined to deposit banks. It was a system-wide run on credit providers, including investment banks and finance companies that funded themselves in wholesale markets. When those markets froze, institutions that had relied on short-term borrowing between themselves could no longer roll over their funding, and the interbank market effectively stopped functioning. Lenders that were still sound began to hoard liquidity instead of lending it.\n\nOnce funding markets tighten, banks ration credit rather than simply raising its price. They become more selective about borrowers, demand more collateral, shorten loan maturities and withdraw from marginal customers. Federal Reserve analysis of the 2007–2009 downturn describes banks raising risk premiums, tightening non-price lending standards and increasing fees, while also building capital and loss reserves. Small firms, which depend heavily on bank loans and have few alternatives, tend to bear the brunt, and recent research suggests that restricted household access to loans can affect employment as well as firm access.\n\nBalance-sheet recessions and deleveraging\n\nA second mechanism operates through borrowers' own balance sheets rather than lenders'. When asset prices fall sharply after a debt-fuelled boom, the value of collateral drops and many households and companies find their liabilities exceeding their assets. Richard Koo, of Nomura Research Institute, called this a balance-sheet recession, drawing on Japan's experience after the early-1990s collapse of real estate and equity prices. In his account, the private sector shifts its priority from maximising profit to repairing its finances and pays down debt even when interest rates are near zero. Because the funds are used for repayment rather than spending, the usual transmission of low policy rates into borrowing and demand is weakened, a point that connects to the limits of monetary-policy discussed in the policy section. Bernanke's 2007–2009 analysis treats this household deleveraging, driven by the housing bust, as a separate channel from the banking panic, and the two often reinforce each other because falling asset prices weaken bank balance sheets as well.\n\nBank capital, losses and slow recovery\n\nThe health of the banking system shapes how far credit contracts and how quickly it returns. Losses on loans and securities erode bank-capital, and a bank with thin capital must shrink its balance sheet or raise new equity, which is costly during a crisis. IMF research on the global financial crisis found substantial variation in how well banks could keep lending, with banks that had weaker capital and greater reliance on fragile wholesale funding cutting credit more sharply. Such frictions help explain why the recovery of financial-intermediation can lag behind the recovery of the wider economy.\n\nCarmen Reinhart and Kenneth Rogoff's study of around 100 systemic banking crises found that real per capita GDP took about eight years, on average, to regain its pre-crisis level, with a median of roughly six and a half years. The IMF has likewise reported that recoveries from recessions associated with financial crises tend to be weaker than others. The pattern is contested, however. Critics argue that banking crises are not the main reason for slow recoveries and that the evidence is sensitive to how episodes are selected and measured. The balance of evidence still points to financial-crisis recessions being deeper and slower on average, but the size of that effect is debated.\n\nLender of last resort and stabilisation\n\nBecause these mechanisms depend on the functioning of liquidity markets, policy responses focus on restoring funding and confidence. A lender-of-last-resort supplies emergency credit to solvent institutions facing runs, while deposit-insurance reduces the incentive to withdraw funds. Measures to recapitalise banks and to reopen interbank and wholesale markets aim to break the link between credit contraction and falling output. These tools are examined further in the policy section." }, { "heading": "Indicators, forecasting, and real-time identification", "text": "Economists sort indicators by their timing relative to the cycle. Coincident indicators move roughly together with the economy. In the NBER's own framing, a recession is visible across real GDP, real income, employment, industrial production, and wholesale-retail sales, which is why these series anchor the dating of business-cycle turning points. Leading indicators move before the cycle turns and are used to anticipate it. Initial jobless claims are the best-known example. Barnichon (2010) found that claims predicted recessions in the short term better than the unemployment rate, which tends to rise only after a downturn has begun. Other leading series often cited include building permits, which respond to expected demand for new housing, and the slope of the interest-rate yield curve, where an inverted curve has historically preceded recessions. These are signals, not guarantees, and their track records vary by episode.\n\nRules and models for signalling downturns\n\nThe Sahm rule is the most widely followed simple rule. Developed by Claudia Sahm, a former Federal Reserve economist, it signals that a recession has probably begun when the three-month moving average of the national unemployment rate is at least 0.5 percentage points above its lowest three-month average over the previous 12 months. Its appeal is simplicity and timeliness, since it uses only one monthly series. It is also limited. A Richmond Fed brief notes that the rule tends to become a useful indicator only some months after a recession starts, and that it has produced at least four false alarms since 1950. The rule was triggered in July 2024, a reading that was partly driven by labour-force growth rather than mass layoffs, which illustrates how a rule can fire for reasons other than a conventional downturn.\n\nA different approach uses statistical models. James Hamilton's (1989) Markov-switching model treats the economy as moving between unobserved regimes, such as expansion and recession, governed by a markov-chain. Using a filter, the model produces the probability that the economy is in each regime given the data available up to a given date, and smoothed probabilities can be computed once the full sample is known. Transition probabilities can be held constant or allowed to vary with economic conditions, a extension developed by Diebold, Lee and Rebucci's predecessors and by Filardo in the 1990s. Such models output a recession probability rather than a yes-or-no verdict, and a single series can match NBER dates closely. However, the likelihood surfaces of these models often have several local maxima, so results can be sensitive to specification, sample period, and the number of regimes assumed.\n\nThe lag between onset and announcement\n\nOfficial recognition comes late. The NBER's Business Cycle Dating Committee identifies the peak and trough months only after enough data have accumulated, and it does not pin down the exact day a recession began. The COVID-19 recession was the fastest case in its modern record: the committee announced on 8 June 2020 that activity had peaked in February 2020, a lag of about four months. It announced the April 2020 trough on 19 July 2021, roughly fifteen months after the trough month, and it described the episode as the shortest US recession on record. Commentators have noted that declarations usually come nine to twelve months after the event, so the 2020 case was exceptional. Real-time judgment is further complicated by data revisions. Early estimates of GDP, employment, and income are often revised, sometimes substantially, so a downturn that looks clear in the first release may appear milder, or later, once the data are updated.\n\nStatistical signals and public perception\n\nForecasters therefore report probabilities rather than certainties, and they state the conditions under which a signal has been wrong. A rule that fires early risks false alarms; a rule that waits for confirmation arrives too late to inform policy. Public perception often lags or diverges from the statistics. Households respond to prices, job security, and news coverage, and a labour market can feel weak to workers even when headline measures remain stable, or vice versa. The gap between what indicators say and what people experience is one reason definitions and signals matter in policy debates, as later sections on terminology and policy response explore." }, { "heading": "Historical episodes", "text": "The Great Depression of 1929–1933 is the most severe contraction in the American record. The NBER dates its peak to August 1929 and its trough to March 1933. Real output fell by roughly a quarter, unemployment reached about a quarter of the labour force, and thousands of banks failed in a series of waves between 1930 and 1933. The collapse of the banking system shrank the money supply and cut off credit to firms and households, which is why the episode became the reference case for later theories of recession, from Keynes's argument about deficient demand to the monetary explanation advanced by Friedman and Schwartz. Its scale also shaped the way later downturns were discussed, and the Great Depression remains the benchmark against which subsequent contractions are measured.\n\nOil shocks and stagflation, 1973–1982\n\nThe 1973–1975 recession followed the October 1973 Arab oil embargo, which pushed up the price of imported crude sharply. Because the energy shock raised production costs while output was falling, it produced stagflation: inflation and unemployment rose together, a combination that the simple Phillips curve trade-off had seemed to rule out. Unemployment climbed to 9% by May 1975, a postwar high at that time, while consumer prices moved into double-digit annual growth. Economists still disagree about how much of the stagflation came from the oil shock itself and how much from the monetary policy that accommodated or reacted to it.\n\nA second oil shock in 1979, tied to the Iranian revolution, arrived while inflation was already high. The Federal Reserve under Paul Volcker responded by raising the federal funds rate to around 20% in 1980. This brought a short recession in early 1980, followed by a brief recovery and then a deeper downturn that the NBER dates from July 1981 to November 1982. Together these episodes are usually called the double-dip recession. Unemployment rose into double digits for the first time since the 1930s, and the policy that broke inflation was among the costliest in postwar American history.\n\nThe 2001 and 2007–2009 recessions\n\nThe 2001 recession ran from the NBER's March 2001 peak to its November 2001 trough. It was linked to the collapse of technology stock prices after the late-1990s boom, which reduced business investment in equipment and software. Output fell only modestly, but the recovery in employment was slow, and unemployment kept rising for some time after the official trough. The downturn was also shaped by the aftermath of the September 2001 attacks.\n\nThe Great Recession ran from December 2007 to June 2009, making it the longest U.S. recession since the Second World War at that point. It was rooted in a housing and credit boom: rising mortgage lending, falling lending standards, and the losses that followed when house prices dropped. Its financial dimension, including the failure of Lehman Brothers in September 2008, produced a severe credit contraction, and unemployment peaked at about 10% in October 2009, several months after the economy had begun to grow again. The slow recovery of employment after this recession is a central reference point in later debates on financial stabilisation and demand policy.\n\nThe COVID-19 recession\n\nThe 2020 recession had an unusual profile. The NBER dates the peak to February 2020 and the trough to April 2020, so the downturn lasted only two months and is the shortest on record. Its depth was nonetheless extreme: lockdowns and the sudden halt in services spending produced one of the steepest quarterly output declines ever recorded, and the unemployment rate jumped to nearly 15% in April 2020 before falling quickly. The unusually short duration reflected the fact that the shock was an abrupt, policy-induced stoppage rather than a gradual build-up of imbalances, and that large fiscal and monetary responses were enacted within weeks.\n\nJapan's lost decade\n\nOutside the United States, Japan's experience in the 1990s is the best-known case of prolonged stagnation. A speculative boom in stocks and land in the late 1980s ended in the early 1990s, when asset prices fell sharply: equity values dropped by roughly 60% between 1989 and 1992, and land prices kept falling for years afterwards. Banks that had lent heavily against property were left with large volumes of bad loans, which constrained their willingness to lend and weakened corporate investment. Deflation then became persistent, and growth remained weak for much of the following decade and beyond. The period is often dated to the early 1990s and described as lasting until about 2003, though the economy never returned to its pre-bubble growth path. The Japanese case is often cited in discussions of how financial-sector losses can prolong a downturn, a theme that recurs in the bank capital and lender-of-last-resort discussions elsewhere in this entry." }, { "heading": "Economic and social consequences", "text": "Unemployment and scarring\n\nThe costs of a recession can outlast the downturn itself. Jesse Rothstein's analysis of the Great Recession found that workers entering the labor market during a recession have permanently lower employment rates and lower earnings long after the recession has ended. The gap was large: annual employment rates of these cohorts fell by 2 to 4 percentage points relative to older workers in the same labor market. Graduates who were already established before 2005 had largely returned to prerecession levels of employment by 2014, while later entrants had not recovered. Per person, the estimated effect is modest. Rothstein puts it at 2 percent less [earnings] through the early years of their careers and about one week of lost employment over a career, but summed across a generation it becomes a large loss.\n\nOther research on graduates points the same way. Studies of the 2000s downturn found that even when people worked more to offset lost income, the earnings gap was only closed temporarily, and initial and late-life earnings losses were never recovered. The mechanism often runs through the first job. Recessions reduce labour mobility and the quality of the first job, which makes it harder for young workers to climb the first rungs of the job ladder, with significant effects on lifetime incomes. Delayed entry and reduced schooling add to the damage, since recessions make it harder to pay for formal education, lowering investment in human capital and, in turn, lifetime earnings.\n\nLong-term joblessness is a central channel. During the Great Recession in the United States, the increase in long-term unemployment, which tripled at its peak, was unprecedented in the post-war period. Long spells of joblessness reinforce themselves: the longer one is unemployed, the harder it is to find work, and poverty can reinforce joblessness just as joblessness can increase poverty. See economic scarring and long-term unemployment for broader treatments.\n\nDistributional effects\n\nThe burden of a downturn falls unevenly. Job losses in the 2008 recession were concentrated at the lower end of the educational distribution in both Europe and the United States. One reason is that lower-educated workers are overrepresented in sectors that are most cyclical, such as manufacturing and construction, and in temporary employment. Sectoral differences were also stark: job loss in the construction industry was three times that of the financial sector. Age and race patterns matter as well, since long-term unemployment affects minorities and those over age 55 disproportionately.\n\nThese shocks translate into poverty and inequality. The US poverty rate rose from 12.3% in 2006 to 15.1% during the Great Recession. Economists describe the general pattern as one in which persons with low earnings are hit hard, and poverty rises, as does inequality. Wealth inequality also widened, reflecting disproportionately large impacts among disadvantaged groups. The effects reach the next generation. A study of the 1980–1982 recession found that children born in counties with a more severe recession are less likely to obtain a college degree and, as adults, earn less income and experience higher poverty rates.\n\nHealth and well-being\n\nA 2016 systematic review of 101 studies concluded that economic recessions and mediators such as unemployment, income decline, and unmanageable debts are significantly associated with poor mental wellbeing, increased rates of common mental disorders, substance-related disorders, and suicidal behaviours. Because most of this research is cross-sectional, causality inferences are seriously limited. One review found the mental health effects especially pronounced for young men, where unemployment raised the risk of substance abuse and suicide.\n\nMortality evidence is more mixed. Country-level studies often find that mortality declines during recessions, meaning people live longer, and that motor vehicle deaths decrease during recessions. Suicides, however, tend to rise. Individual-level studies generally point the other way: one analysis found that the unemployment rate for a given education group was positively related to mortality in that group. Long-run effects also appear negative. One study found that even if recessions reduce mortality at the time of the recession, workers who experience a recession in their fifties are expected to die sooner. Health-system capacity appears to matter. In a Brazilian study, in municipalities with high expenditure on health and social protection programmes, no significant increases in recession-related mortality were observed. Access to care is also affected by job loss; in the United States in 2008, the number of people without health insurance was 46.3 million.\n\nFirm and public-finance effects\n\nFor firms, a fall in sales squeezes cash flow, which raises the rate of bankruptcies, particularly among highly indebted and small businesses. Investment and research spending are typically postponed, and the resulting shortfall in capital and know-how weakens productivity for years after output recovers. Public finances deteriorate on both sides of the ledger. Tax receipts from incomes, profits and consumption decline, while spending on unemployment benefits and other transfers rises through automatic-stabilizers. The combination widens budget deficits and raises public debt, which can constrain the scope for later fiscal-policy responses." }, { "heading": "Policy responses", "text": "Monetary policy\n\nCentral banks usually answer a downturn by lowering their policy rate. The Federal Open Market Committee's target was 5.25 percent in August 2007. Sixteen months later, with the 2008 financial crisis in full swing, the FOMC had lowered the target for the federal funds rate to nearly zero. That reduction is the core of monetary policy practice, and the interest rate is the main lever.\n\nOnce a policy rate reaches the effective lower bound, the central bank cannot cut it further, and it must turn to other tools. Because the Fed was at zero in late 2008, it resorted to unconventional monetary policy, including a series of QE experiments that continued into late 2014. Quantitative easing works through the central bank's balance sheet rather than through the overnight rate. The first round, announced in November 2008, committed to purchasing $600 billion in mortgage-backed securities (MBS) and $100 billion in agency debt. The aim was to lower long-term borrowing costs and restore functioning in markets that had seized up. Central banks also use forward guidance, meaning public commitments about the future path of rates. Once the rate hit zero, the Fed included in its minutes wording that indicated it anticipated that economic conditions would warrant a low FFR for some time into the future.\n\nFiscal policy\n\nFiscal policy operates through two channels. The first is automatic stabilizers. Automatic stabilizers are features of the structure of modern government budgets, particularly income taxes and welfare spending, that act to reduce fluctuations in real GDP. Tax receipts fall and transfers such as unemployment insurance rise without any new legislation, so the budget deficit widens during a slump. The Congressional Budget Office estimated that stabilizers increased the deficit by 32.9% in fiscal 2009, as the deficit soared to $1.4 trillion. A study of 1980 to 2018 found that automatic stabilizers provide about half of the total fiscal stabilization, with the other half provided by discretionary fiscal policy.\n\nThe second channel is discretionary stimulus, such as spending programmes or tax rebates passed by legislators. Its size depends on the fiscal multiplier, the ratio of the change in output to the initial change in spending or taxes. With a marginal propensity to consume of 0.8, the simple multiplier is 1/(1 − 0.8) = 5, but real-world estimates vary widely. The IMF notes that their estimation is tricky. In particular, it is difficult to isolate the direct effect of fiscal measures on GDP, because of the two-way relationships between these variables. Economists also disagree about how much automatic stabilizers themselves reduce multipliers, since the automatic response of transfers and taxes offsets part of the initial shock.\n\nFinancial stabilization\n\nPolicy in the 2008 crisis also targeted banks and funding markets directly. The Emergency Economic Stabilization Act was signed into law on October 3, 2008. Among its measures, the first initiative under EESA was to temporarily raise the basic limit on federal deposit insurance coverage from $100,000 to $250,000 per depositor. The Troubled Asset Relief Program then provided capital to banks. The U.S. Treasury announced on October 24, 2008 its plans to direct $250 billion into preferred stock investments of financial institutions. These measures were meant to address bank capital shortfalls, not only the liquidity problems that justify a lender-of-last-resort role.\n\nThe FDIC's Temporary Liquidity Guarantee Program covered funding that banks could no longer raise in wholesale markets. It had two components. It provided a limited-term guarantee for certain newly issued debt not only of banks and thrifts but also of bank, thrift, and financial holding companies. Additionally, the TLGP fully guaranteed certain non-interest-bearing transaction deposit accounts. Deposit insurance is discussed in its own article, but the 2008 episode shows how guarantees can restore liquidity to the banking system.\n\nTrade-offs and lags\n\nEach tool faces timing problems. Automatic stabilizers respond quickly, which is their main advantage, because they act in the first paycheck cycle after income is lost. Discretionary measures often take months to pass, and by then the economy may have begun to recover. Monetary policy also works with delays, since rate changes and asset purchases affect spending and prices only after a lag of several quarters.\n\nSupport also carries costs. Large deficits and expanded central bank balance sheets can raise inflation risks and increase public debt. Policymakers therefore disagree about when to withdraw support. Temporary measures can be a source of contention: the enhanced deposit insurance was scheduled to end, and the basic deposit insurance limit will return to $100,000 after December 31, 2009. Premature withdrawal risks a renewed downturn, while delayed withdrawal risks inflation and distortions in financial markets." }, { "heading": "Theories and schools of thought", "text": "Classical economists generally held that recessions were temporary departures from full employment that flexible wages and prices would eventually correct. Under Say's law, production was assumed to create its own demand, so a general glut was not expected to persist. The slump of the 1930s challenged this view. In The General Theory of Employment, Interest and Money (1936), John Maynard Keynes argued that an economy could settle into a prolonged slump below full employment. In his account, insufficient aggregate demand was the central problem. Sticky wages and prices prevented the self-correction that classical models assumed, and weak investment incentives under uncertainty could keep spending low. Keynes therefore argued that the state should fill the gap in private demand. This became the core of Keynesian economics.\n\nMonetarist accounts shifted the focus to money. In A Monetary History of the United States (1963), Milton Friedman and Anna Schwartz argued that the Great Depression was largely a monetary event. Between 1929 and 1933 the money stock fell by roughly a third, and a wave of bank failures went unchecked while the Federal Reserve did little to supply reserves. Their argument treats the money supply as a key driver of nominal spending and output, and it faults the central bank for failing to act as a lender of last resort. On this reading, the depth of a recession can reflect policy errors as much as private-sector collapse. Monetarists also favored predictable rules for money growth over discretionary fine-tuning, a position that shaped later debates about monetary policy.\n\nThe Austrian business cycle theory, associated with Ludwig von Mises and Friedrich Hayek, locates the origin of recessions in the preceding boom. When credit expansion pushes market interest rates below the level that balances saving and investment, relative prices are distorted and resources flow into projects that cannot be sustained. The downturn is the liquidation of these errors, and attempts to stop it by cutting rates or propping up firms are seen as prolonging the misallocation. Critics, including Keynesians and monetarists, objected that the theory neglected aggregate demand and implied that a painful liquidation should be tolerated.\n\nHyman Minsky's financial instability hypothesis, developed from the 1960s and set out most fully in the 1970s and 1980s, argues that stability itself breeds fragility. Minsky described a progression from hedge finance, in which borrowers repay from cash flows, to speculative finance and finally Ponzi finance, in which debts depend on rising asset prices. Long periods of calm encourage lenders and borrowers to take on more leverage and underprice risk, which makes the financial system more vulnerable to a shock. Minsky's ideas drew renewed attention after 2007–2009, although critics note that they are less formal and harder to test than mainstream models.\n\nModern macroeconomics is organized around a disagreement about whether recessions are driven mainly by shocks or by the mechanisms that propagate them. The real business cycle models of Finn Kydland and Edward Prescott, which began in the early 1980s, explain fluctuations through shocks to technology and productivity in an economy with flexible prices and optimizing agents. In this framework, recessions can be efficient responses to adverse shocks, and monetary factors play a limited role. Critics question the size and nature of the shocks required. New Keynesian models instead emphasize nominal rigidities, such as sticky prices and wage contracts arising from menu costs and imperfect competition. These rigidities allow demand and monetary shocks to have real effects and provide a rationale for stabilization policy. Most current macroeconomic models combine elements of both approaches, and the debate over the relative weight of shocks and propagation continues, with the 2007–2009 crisis prompting greater attention to financial frictions and balance-sheet effects within these models." }, { "heading": "Depression, terminology, and international variation", "text": "Depression as an undefined term\n\n\"Depression\" has no formal definition. The IMF notes that most analysts treat a depression as an extremely severe recession in which GDP falls by more than 10 percent. Some proposals add a duration test, such as a recession lasting two years or more, but these are conventions, not official thresholds. The NBER states that it does not separately identify depressions in its business-cycle chronology, so the label rests on judgment about depth and length. Duration is also measured inconsistently: some economists count only the period of falling activity, while the more common usage runs until output returns close to normal levels.\n\nThe Great Depression of the 1930s is the reference case. The NBER dates its peak to August 1929 and its trough to March 1933, with a second peak in May 1937 and a trough in June 1938. The IMF estimates that US output fell by roughly 30 percent over about four years. Since 1960, advanced economies have experienced only a handful of depression episodes; the IMF cites Finland's early-1990s slump, in which GDP fell by about 14 percent, as the most recent of these.\n\nThe technical recession\n\nA \"technical recession\" is a shorthand rule: two consecutive quarters of falling real GDP. The IMF describes this as a practical rule of thumb that is useful but has drawbacks. The rule is often traced to Julius Shiskin, then head of the US Bureau of Labor Statistics, who proposed it in 1974, although this attribution is secondary. It is common in journalism and textbooks, and some national and supranational statements use similar wording. Eurostat describes a recession as zero or negative growth in at least two successive quarters, and the UK Treasury refers to two or more consecutive quarters of contraction as the commonly accepted definition.\n\nThe rule diverges from official dating in several ways. Quarterly GDP components are volatile and can distort the signal, so two negative quarters may misrepresent underlying growth. The Reserve Bank of Australia also points out that GDP can grow weakly, without turning negative, while unemployment rises sharply. Conversely, the rule can miss real downturns: the 2001 US recession did not produce two consecutive quarters of decline. When trend growth is close to zero, small negative readings occur regularly and do not by themselves signal a recession, as the euro area's dating committee has argued.\n\nDating bodies across countries\n\nOfficial chronologies are produced by different bodies. In the United States, the NBER's Business Cycle Dating Committee sets the reference dates, using a broad range of indicators rather than GDP alone. National statistical offices supply the underlying national accounts data on which most national judgments depend.\n\nThe euro area has its own committee. The CEPR-EABCN Euro Area Business Cycle Dating Committee, founded by the Centre for Economic Policy Research in 2003, dates recessions and expansions for the eleven original euro-area members plus Greece over 1970–1998, and for the euro area as a whole from 1999 onward. It adapts the NBER definition to the euro area, dates turning points in quarters rather than months, and does not date individual countries. Its chronology can diverge from the simple rule of thumb. In 2012 Eurostat reported a second consecutive quarterly decline, but the committee dated the euro-area peak to the third quarter of 2011, meaning the recession had begun earlier than the headline rule implied. For the 2008–2009 downturn, it identified a peak in early 2008, a trough in the second quarter of 2009, and an output decline of about 5.5 percent.\n\nPolitical and public usage\n\nPublic and political usage often departs from the technical meaning. Media coverage tends to rely on the two-quarter rule, while official chronologies may come months later and rest on broader evidence. In 2022, US GDP fell for two consecutive quarters, and many commentators described this as a technical recession, even though it was not a formal dating decision. Because the word carries political weight, the choice of criterion can shape debate about whether an economy is \"in recession,\" and therefore about government messaging, fiscal and monetary responses, and electoral arguments. Clear definitions matter for policy because different criteria can yield different start dates for the same episode." } ], "links": [ "business-cycle", "economics", "macroeconomics", "gross-domestic-product", "unemployment", "central-bank", "monetary-policy", "fiscal-policy", "inflation", "global-value-chain", "bank-capital", "financial-intermediation", "lender-of-last-resort", "deposit-insurance", "interest-rate", "markov-chain", "great-depression", "federal-reserve-system", "financial-market", "productivity", "automatic-stabilizers", "quantitative-easing", "forward-guidance", "fiscal-multiplier", "liquidity", "bank", "government", "john-maynard-keynes", "aggregate-demand", "keynesian-economics", "money-supply", "balance-sheet", "national-accounts" ], "sources": [ { "title": "NBER Recession Definition: Business Cycle Dating Committee 2026", "url": "https://whatisarecession.com/nber-definition" }, { "title": "Business Cycles in the NBER Business Cycle Dating Committee Framework (edition XLXIV)", "url": "https://econbrowser.com/archives/2022/06/business-cycles-in-the-nber-business-cycle-dating-committee-framework-edition-xlxiv" }, { "title": "Business Cycle Dating Committee Announcement July 19, 2021", "url": "https://www.nber.org/news/business-cycle-dating-committee-announcement-july-19-2021" }, { "title": "Recession: When Bad Times Prevail - Back to Basics: Finance & Development", "url": "https://www.imf.org/external/pubs/ft/fandd/basics/recess.htm" }, { "title": "What is a Recession? 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