Saturday, September 22, 2007

"Helicopter Ben" Bernanke

In monetary economics, a liquidity trap occurs when the economy is stagnant, the nominal interest rate is close or equal to zero, and the monetary authority is unable to stimulate the economy with traditional monetary policy tools. In this kind of situation, people do not expect high returns on physical or financial investments, so they keep assets in short-term cash bank accounts or hoards rather than making long-term investments. This makes the recession even more severe.

In normal times, the monetary authority (usually a central bank or finance ministry) can stimulate the economy by lowering interest rate targets or increasing the monetary base. Either action should increase borrowing and lending, consumption, and fixed investment. When the relevant interest rate is already at or near zero, the monetary authority cannot lower it to stimulate the economy. The monetary authority can increase the overall quantity of money available to the economy, but traditional monetary policy tools do not inject new money directly into the economy. Rather, the new liquidity created must be injected into the real economy by way of financial intermediaries such as banks. In a liquidity trap environment, banks are unwilling to lend, so the central bank's newly-created liquidity is trapped behind unwilling lenders.

Milton Friedman suggested that a monetary authority can escape a liquidity trap by bypassing financial intermediaries to give money directly to consumers or businesses. This is referred to as a money gift or as helicopter money (this latter phrase is meant to call forth the image of a central banker hovering in a helicopter, dropping suitcases full of money to individuals). Political considerations make it difficult for a monetary authority to grant the money gift, because individuals and firms not receiving free money will exert political pressure. The monetary authority must act covertly to give gift money to specific individuals or firms without appearing to give money away. During the Great Depression in the United States, the Federal Reserve offered to buy any gold at a price well above current market prices. This was essentially a money gift to gold holders.

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