Recession

Economies do not grow in a straight line. They expand, then contract, and the contractions, recessions, are where much of the economic pain concentrates.

A recession is a significant, widespread, and sustained decline in economic activity, typically marked by falling output, rising unemployment, and reduced spending and investment. A common rule of thumb defines it as two consecutive quarters of falling GDP, though official bodies use broader judgements.

More than two quarters

The two-quarters rule is convenient but crude. The agencies that formally date recessions look at a range of indicators, output, employment, income, sales, and judge whether the decline is deep, broad, and lasting enough to count. A recession is better understood as a pervasive downturn across the economy than as a single statistic crossing a threshold, which is why the formal call sometimes differs from the rule of thumb.

What happens in a downturn

Recessions tend to feed on themselves in the short run. Falling demand leads firms to cut output and jobs; rising unemployment and uncertainty lead households to spend less; weaker sales lead firms to cut further. This vicious circle is why recessions, once begun, can deepen, and why governments and central banks intervene with lower interest rates and fiscal stimulus to break the spiral and support demand.

Necessary correction or avoidable pain

There are two ways to view recessions. One sees them as painful but sometimes necessary corrections, purging unsustainable booms, reallocating resources, and clearing out misallocations built up in good times. The other stresses the avoidable human cost, lost jobs, lost output, lasting scars on those who suffer them, and the case for active policy to prevent or shorten them. Both contain truth: some downturns follow excess, but the suffering is real and often falls hardest on those least responsible.

A recession is the contraction phase of the business cycle, and the part of it that dominates politics and policy. Understanding recessions, what triggers them, why they spread, and how to soften them, is much of what macroeconomic management is about, because it is in the downturn that the stakes are highest.