For the last few months, I and others have watched, with amazement and horror, the emergence of a consensus in policy circles in favor of immediate fiscal austerity. That is, somehow it has become conventional wisdom that now is the time to slash spending, despite the fact that the world’s major economies remain deeply depressed…

What’s the evidence for the belief that fiscal contraction is actually expansionary, because it improves confidence? (By the way, this is precisely the doctrine expounded by Herbert Hoover in 1932.) Well, there have been historical cases of spending cuts and tax increases followed by economic growth. But as far as I can tell, every one of those examples proves, on closer examination, to be a case in which the negative effects of austerity were offset by other factors, factors not likely to be relevant today. For example, Ireland’s era of austerity-with-growth in the 1980s depended on a drastic move from trade deficit to trade surplus, which isn’t a strategy everyone can pursue at the same time.

And current examples of austerity are anything but encouraging. Ireland has been a good soldier in this crisis, grimly implementing savage spending cuts. Its reward has been a Depression-level slump — and financial markets continue to treat it as a serious default risk. Other good soldiers, like Latvia and Estonia, have done even worse — and all three nations have, believe it or not, had worse slumps in output and employment than Iceland, which was forced by the sheer scale of its financial crisis to adopt less orthodox policies.