Crowding Out Effect

Definition

The situation where heavy government borrowing to finance a deficit pushes up interest rates and reduces the funds available for private investment, so public spending "crowds out" private spending.

Key points

• Mechanism: a large fiscal deficit means the government borrows heavily from the market, raising the demand for loanable funds and hence interest rates.
• Higher interest rates make borrowing costlier for firms and households, reducing private investment and consumption.
• It is a key argument against running persistently large fiscal deficits; see concept fiscal deficit and concept deficit financing.
• The opposite is "crowding in", where public investment in infrastructure raises private sector confidence and investment.
• The effect is weaker when the economy has idle resources (a recession), so deficit spending then does less damage to private activity.

Why it matters for CAPF

The definition (government borrowing raising rates and squeezing private investment) and its link to large fiscal deficits are standard fiscal-policy facts.

Common confusion

Crowding out (public borrowing reduces private investment via higher interest rates) versus crowding in (public investment encourages more private investment); the effect is strongest when resources are fully employed.

Parent note

budget and fiscal policy