By Simon Wren-Lewis:

What is hardly ever said, so I make no apologies for doing so once more, is that macroeconomic theory has in some ways ‘had a good crisis’. Basic Keynesian macroeconomic theory says you don’t worry about borrowing in a recession because interest rates will not rise, and they have not. New Keynesian theory says creating loads of new money will not lead to runaway inflation and it has not. Above all else, macroeconomic theory and most evidence said that the turn to austerity in 2010 would delay or weaken the recovery and that is exactly what happened. As Paul Krugman often says, it is quite rare for macroeconomics to be so fundamentally tested, and it passed that test. We should be talking not about a phoney crisis in economics, but why policy makers today have ignored economics, and thereby lost their citizens’ the equivalent of a lot of money.

Source: mainly macro: Miles on Haldane on Economics in Crises


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