Myth: deflation is good because everything gets cheaper

The claim

"Deflation is good. If prices fall, everyone can afford more. Why would anyone want inflation?"

The kernel of truth

Falling prices can be beneficial when they come from productivity gains. If firms become more efficient, they can lower prices while paying higher real wages. The late nineteenth century combined falling prices with rapid industrial growth in several economies.

So deflation is not automatically bad. The context matters.

Why it can be dangerous

The problem is the interaction between falling prices and nominal debt.

• A mortgage, business loan, or government bond is fixed in nominal terms.
• If prices and incomes fall, the real burden of the debt rises.
• Borrowers cut spending and sell assets to repay debt.
• That weakens demand and pushes prices down further.
• The real debt burden rises again.

This is Irving Fisher's debt-deflation mechanism.^[1] It can turn a recession into a prolonged contraction.

Other channels

• Delayed spending. If households expect prices to fall, they may postpone purchases, which weakens demand.
• Sticky wages. Firms may cut prices but not wages, squeezing profits and employment.
• Bank losses. Falling collateral values and defaults reduce bank capital and lending.
• The lower bound. If the policy rate is near zero, the central bank cannot cut much further with conventional tools.^[2]

The policy response

Central banks can use asset purchases, forward guidance, and other unconventional tools. Fiscal policy can support demand. Balance-sheet repair — recapitalising banks and writing down unsustainable debts — can restore the transmission mechanism. A credible inflation target can anchor expectations.^[3]

The correction

Deflation is not good or bad in the abstract. Productivity-driven deflation can be benign. Debt-driven deflation can be corrosive. The difference is the level of nominal debt, the state of demand, and the credibility of policy.