Simon Wren-Lewis is "fed up":
Sachs and the age of diminished expectations: I do not normally talk much about the US economy, because there are so many others writing articles and posts that can do so with more authority. But I am getting increasingly fed up with people telling me that US growth disproves the idea that austerity is bad for you at the Zero Lower Bound (ZLB). Jeffrey Sachs just joins a long list.
Of course the proper way to tackle this is as Paul Krugman does. As he says other stuff happens (like a large fall in the US savings ratio in 2013), so you need to go beyond a single country and look at lots of data. However this might leave the impression that somehow the US case is unusual and does not fit a Keynesian story. In this respect I did a simple exercise...
After presenting his exercise -- he compares a counterfactual where there was no austerity to the actual austerity driven path for the US -- he concludes:
With recent US experience, there is no case against Keynesian analysis to answer.
This suggests to me two things. First, lots of people are desperate to show that critics of austerity at the ZLB are wrong, and are prepared to make nonsense arguments to that end. This may be particularly true if you very publicly proclaimed the need for austerity in 2010 (note the co-author: HT John McHale). Second, it is a sad day when anyone thinks that 2.3% growth is “brisk” when we are recovering from a deep recession and interest rates have remained at the ZLB. It is so very dangerous when these diminished expectations become internalised by the elite.
As he says, we also need to look across countries, and he has presented lots of evidence on the harm austerity has done to the UK economy.