There can be little doubt. The science of macroeconomics is in deep trouble. The best and the brightest in the field fight over the most basic problems. Take government budget deficits, which now exceed 10 per cent of gross domestic product in countries such as the US and the UK. One camp of macroeconomists claims that, if not quickly reversed, such deficits will lead to rising interest rates and a crowding out of private investment. Instead of stimulating the economy, the deficits will lead to a new recession coupled with a surge in inflation. Wrong, says the other camp. There is no danger of inflation. These large deficits are necessary to avoid deflation. A clampdown on deficits would intensify the deflationary forces in the economy and would lead to a new and more intense recession.
Or take monetary policy. One camp warns that the build-up of massive amounts of liquidity is the surest road to hyperinflation and advises central banks to prepare an “exit strategy”. Nonsense, the other camp retorts. The build-up of liquidity just reflects the fact that banks are hoarding funds to improve their balance sheets. They sit on this pile of cash but do not use it to increase credit. Once the economy picks up, central banks can withdraw the liquidity as fast as they injected it. The risk of inflation is zero.
Both camps line up an impressive list of Nobel prize-winners to buttress their arguments. Economists have often disagreed in the past, but this time the tone is different. The protagonists do not hesitate to accuse the other camp of ignorance or bad faith. I have never seen anything like this.