Paul, Larry, Secular Stagnation, Sand the Impact of Negative Real Rates by Jared Bernstein
Krugman blogged about the same themes as Summers's radical IMF presentation back in September.
Me Too! Blogging by Krugman
Bubbles, Regulation, and Secular Stagnation by Krugman
The trouble with this line of argument is that if monetary policy is assigned the task of discouraging people from excessive borrowing, it can’t pursue full employment and price stability, which are also worthy goals (as well as being the Fed’s legally binding mandate). Specifically, since the US economy shows no signs of having been overheated on average from 1985 to 2007, the argument that the Fed should nonetheless have set higher rates is an argument that the Fed should have kept the real economy persistently depressed, and unemployment persistently high – and also run the risk of deflation – in order to keep borrowers and lenders from making bad decisions. That’s quite a demand.
Many of us would therefore argue that the right answer isn’t tighter money but tighter regulation: higher capital ratios for banks, limits on risky lending, but also perhaps limits for borrowers too, such as maximum loan-to-value ratios on housing and restrictions on second mortgages. This would guard against bubbles and excessive leverage, while leaving monetary policy free to pursue conventional goals.
Or would it?
Our current episode of deleveraging will eventually end, which will shift the IS curve back to the right. But if we have effective financial regulation, as we should, it won’t shift all the way back to where it was before the crisis. Or to put it in plainer English, during the good old days demand was supported by an ever-growing burden of private debt, which we neither can nor should expect to resume; as a result, demand is going to be lower even once the crisis fades.
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