'Helicopter drop of money' is used as a metaphor for an unconventional monetary policy tool that typically involves central banks printing large sums of money and distributing it directly to the public or investing in public projects.
So far a hypothetical monetary policy, it is being debated to spur spending and boosting economic growth in times of near-zero interest rates and ultra-low or negative inflation.
Delivering a lecture here at the London School of Economics, Rajan said it needed to be asked whether the global monetary policy was increasingly becoming part of the problem, rather than being part of a solution.
Last weekend in New Delhi also, Rajan had said that when the rate of price rise threatens to fall below the lower band or zero, one of the options before the governments and central banks is 'helicopter drop' of money.
However, there was a probability that people may not spend and save it, thereby not contributing to growth, he had said.
'Helicopter drop' was first proposed as an alternative to quantitative easing by the noted American economist Milton Friedman way back in 1969. However, it became popular when Ben Bernanke referred to this term in 2002, when he was a Federal Reserve Governor. This earned 'Helicopter Ben' moniker for Bernanke, who became US Fed Chairman in 2006.
Interestingly, Bernanke as Fed Chairman embarked on various rounds of 'quantitative easing' to invest trillions of dollars into the system to boost economic growth in the US.
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"I am throwing the possibility out there that even helicopter money may not work for the same reason that so much fiscal spending has not elevated growth... So the nuclear option may not be as much of a panacea as some people think," Rajan said.
"Somebody getting this money and seeing the central bank governor throwing this money out of the helicopter, saying 'is this guy crazy? Has the world gone nuts? I am going to save this, because I am not sure what is going to happen," he said.
Rajan, whose current term as the RBI governor comes to an end this September, said the regulatory changes that have come in after the global financial crisis might have made the financial markets riskier.
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