Governments and Markets

When the government spends money during a recession, that money doesn't disappear. It circulates. And every time it changes hands, it generates more economic activity than the original amount spent. That chain reaction is called the fiscal multiplier — and it's why government spending can have an impact on the economy much larger than the headline dollar figure suggests.

Here's the intuition. The government sends a $1,000 check to an unemployed worker. That worker spends $800 at a grocery store. The grocery store pays a clerk $640 in wages. The clerk spends $512 on rent. The landlord uses $410 to fix the roof. And so on down the chain. Each person spends some fraction of what they receive, generating income for the next person. One $1,000 stimulus payment might ripple through the economy and ultimately generate $3,000 or $4,000 in total activity.

The exact size of the multiplier depends on how much of each dollar people spend rather than save — what economists call the marginal propensity to consume. It also depends on the state of the economy. In a recession, when workers and machines are sitting idle, there's more room for spending to generate real activity. Near full employment, new spending mostly causes prices to rise rather than output to increase.

The multiplier doesn't eliminate the cost of government spending — it changes how you must account for it. Judging a stimulus program purely by its headline price tag, without accounting for the economic activity it generates, gives you a deeply incomplete picture.