Economics
How Fiscal Multipliers Vary Across Economic Recessions
Quick fact
Economists estimate that fiscal multipliers can be more than twice as large during deep recessions compared to normal times, sometimes exceeding 1.5, meaning every dollar of government spending boosts GDP by more than a dollar.
Why this is interesting
During the 2008 financial crisis, many governments spent billions to stimulate their economies. But the same spending might have had far less impact if done a few years earlier. Why?
Read the full explanation
Understanding How Fiscal Multipliers Vary Across Economic Recessions
Think of a recession as an economy with unutilized resources: people out of work, factories idle, and demand low. If the government spends money—say, on infrastructure—it hires workers and buys materials, which puts income into people's pockets. They then spend that income, creating a ripple effect: each dollar spent can generate more than a dollar of total economic activity. This is the multiplier effect. In a booming economy, resources are already fully used, so extra government spending can't easily increase production; instead, it competes with private investment, raising interest rates and 'crowding out' private spending, making the multiplier smaller or even zero. The size of the multiplier also depends on how the government pays for the spending (taxes, debt) and whether the central bank helps keep interest rates low.
A deeper explanation
The fundamental mechanism is the role of economic slack. In a recession, households are often liquidity-constrained, meaning they have little savings and need to consume out of current income. When they receive income from government spending, they spend a large fraction, increasing the multiplier. In contrast, in a boom, households may save more of any extra income (for instance, to smooth consumption over time). Moreover, when the economy is at full employment, increased demand leads to higher prices and wages, which the central bank may counter by raising interest rates. This monetary policy response 'crowds out' private investment, dampening the fiscal stimulus. The empirical literature, especially studies of IMF programs and US states, has found robust evidence that multipliers are larger when output is below potential. This state-dependence means that austerity in a recession can be particularly harmful, while stimulus is most effective exactly when it is often politically difficult.