Depression

Also called: slump · Topic: Economic Growth Theories and Business Cycles · NCERT: Class 12, Ch 1 "Introduction (Macroeconomics)"; Class 12, Ch 4 "Determination of Income and Employment"; Class 12, Ch 5 "Government Budget and the Economy"

Meaning

A depression (also called a slump) is a very deep and very long fall in economic activity. It is deeper and lasts longer than a recession. Output, employment, prices and investment all fall sharply. It is the extreme low end of the business cycle (the repeated rise and fall of economic activity around its long-run trend). It matters because the Great Depression of 1929-33 led to Keynes's General Theory (1936), which NCERT calls the birth of macroeconomics. Today's tools for fighting slumps, such as government spending and central bank support to banks, came from the lessons of that crisis.

Explanation

How a depression differs from an ordinary downturn

• The four phases of the business cycle: boom → recession → trough → recovery.
• Recession: output and jobs fall for some time. A common rule of thumb is two quarters in a row of falling real GDP.
• Depression: the same fall, but much deeper and much longer.
• Output, employment, prices and investment all fall sharply.

• Deflation (a fall in the general price level) is a key sign. Prices fall, not just output.

• Why the fall in prices makes things worse: Irving Fisher's debt deflation (1933).

• Prices fall → the real burden of a fixed debt rises.
• Borrowers struggle to repay → they sell goods and assets in a hurry (distress sales).

• Distress sales push prices down further → the cycle repeats.

• Worked example (debt deflation):

• A farmer owes ₹1,000. Wheat sells at ₹10 a kg, so the debt equals 100 kg of wheat.
• Wheat falls to ₹5 a kg. The same debt now equals 200 kg.
• The debt has doubled in real terms, even though the rupee amount did not change.

The Great Depression (1929 onward; worst in 1929-33)

• Jobs: US unemployment rose from 3% to 25% (1929-33), according to NCERT. Britannica says it went "above 20%" [2]. The two figures agree.
• Output:
• Real GDP (output at constant prices) fell by roughly a quarter (1929-33).
• NCERT says US output fell "by about 33 per cent". That figure is closer to the fall in nominal output (output at current prices).

• Britannica puts the GDP fall at about 30% and the fall in industrial production at nearly 47% (1929-33) [2].

• Worked example: why real and nominal falls differ

• Nominal GDP = real output × price level.
• Real output falls 25% (to 0.75). Prices fall 10% (to 0.90).
• Nominal GDP = 0.75 × 0.90 = 0.675, a fall of about 32.5%.

• So the "33%" figure combines the output fall with the price fall.

• Reach: Europe, North America and the wider world were all hit. Factories stood idle because demand was low.

What caused it

• Wall Street crash (October 1929): share prices collapsed. People lost wealth and confidence, so spending and investment were cut sharply [3].
• Bank failures (about 9,000 in 1930-33):
• Bank run: many depositors rush to take out their money at once because they fear the bank will fail.
• By 1933, 20% of the banks that existed in 1930 had failed [2].

• When a bank fails, the money it could have lent disappears, so firms cannot borrow [3].

• Monetary contraction:

• The money stock (all money held by the public, including bank deposits) fell by about a third.

• Friedman and Schwartz (1963) blamed the Federal Reserve (the US central bank). It did not put in money to save the banks, so an ordinary recession became a depression.

• Gold standard (each currency fixed to a set amount of gold, so exchange rates are fixed):

• Countries that were losing gold raised interest rates to protect it. Loans became costlier, so spending fell [3].

• In this way deflation spread from country to country.

• Smoot-Hawley Tariff Act (1930): the USA put steep tariffs (import taxes) on many goods. Other countries hit back with their own tariffs, and world trade shrank [3].

Why demand stays low, and how to fix it

• Keynes (1936): unemployment can last a long time because aggregate demand (total planned spending, AD = C + I + G + (X − M)) is too low. This is called deficient demand.

• Markets do not fix this on their own, so the government should spend more.

• Deflationary gap (Class 12, Chapter 4): planned spending is below what the economy produces at full employment. Output and jobs then fall.

• The multiplier works in reverse: k = 1 / (1 − MPC). MPC (marginal propensity to consume) is the share of each extra rupee that people spend.

• Worked example: if MPC = 0.8, then k = 1/0.2 = 5. A ₹100 crore fall in investment cuts income by ₹500 crore.

• Policy response: Roosevelt's New Deal (from 1933) used public works, relief, job schemes and banking reforms.

In India

• 1930s depression:
• Farm prices collapsed, falling roughly by half (1929-31).
• Peasants in debt could not repay their loans, so they sold their gold and silver. This is Fisher's debt deflation in an Indian village.

• This led to large "distress gold" exports. They helped Britain settle its payments but drained wealth from rural India.

• COVID shock (a recession, not a depression):

• 2020-21: real GDP contracted 5.8%. This was India's first full-year contraction in over four decades [5].
• 2021-22: real GDP grew 9.1% [5]. This was a "V-shaped" recovery (a sharp fall followed by a sharp rebound).

• The NSO (National Statistical Office) measures these figures through its National Accounts estimates.

• Why 2020 did not become a 1930s-style depression:

• The cause was a supply shock (lockdowns), not a banking collapse.
• The RBI gave liquidity support (extra cash for banks) and the government gave a fiscal package. Both came quickly, as Keynes and Friedman would have advised.

Don't confuse with

• Recession: also a fall in output and jobs (rule of thumb: two quarters in a row of falling real GDP), but milder and shorter. A depression is the extreme, long version.
• Deflation: a fall in the price level only. A depression is a fall in activity (output, jobs, investment), although deflation usually comes with it and makes it worse.
• Secular stagnation: a long period of low growth, low interest rates and weak demand. Hansen coined the term (1938) and Summers revived it (2013) [4]. It is slow, lasting weakness, not a sharp collapse. Example: Japan's "lost decades" after 1990.
• Trough: a phase of the business cycle (its lowest point). A depression is a severe episode of downturn, not a phase.

Prelims Hooks

• Great Depression (1929-33): US unemployment rose from 3% to 25%. Real GDP fell about a quarter. NCERT's "33%" is closer to the fall in nominal output.
• About 9,000 US banks failed (1930-33). By 1933, 20% of the banks of 1930 had closed [2].
• Friedman and Schwartz (1963): blamed the Federal Reserve's monetary contraction. Fisher (1933): debt deflation. Trap: do not swap the two.
• Smoot-Hawley Tariff Act (1930) was a US tariff law, not a banking law. It triggered retaliation and shrank world trade [3].
• Keynes's General Theory (1936) is called the birth of macroeconomics. It explains unemployment through deficient aggregate demand.
• India's real GDP fell 5.8% in 2020-21 and grew 9.1% in 2021-22 [5]. This was a V-shaped recovery from a recession, not a depression.

Mains Points

• Two kinds of shocks, two lessons:
• When demand collapses, the Keynesian lesson is that the government should spend more (fiscal policy).
• When banks panic, the monetarist lesson is that the central bank must lend freely.

• India in 2020-21 did both, with RBI liquidity support and a fiscal package, and rebounded from −5.8% to 9.1% [5].

• Protectionism spreads slumps:

• Smoot-Hawley tariffs and the fixed gold standard carried the US slump to other countries [3].

• This matters for today's tariff wars. It supports WTO rules and flexible exchange rates.

• Debt and deflation as amplifiers:

• Falling prices raise the real burden of debt. India's farmers in 1929-31 were forced into distress gold sales.
• This supports macroprudential regulation, such as RBI limits on lending and bank capital buffers, to stop credit booms from turning into deep busts. Recall India's twin balance sheet problem after the 2000s credit boom.

Related concepts

• Great Depression
• Kondratiev waves
• Secular stagnation

Read more

• Depressions and theories of the cycle