Secular Stagnation, Coalmines, Bubbles, and Larry Summers por P. Krugman

Les recomiendo leer este comentario de Paul Krugman respecto a un discurso de Larry Summers
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 spending is good, and while productive spending is best, unproductive spending is still better than nothing.

..... the underlying problem in all of this is simply that real interest rates are too high. But, you say, they’re negative – zero nominal rates minus at least some expected inflation. To which the answer is, so? If the market wants a strongly negative real interest rate, we’ll have persistent problems until we find a way to deliver such a rate.

One way to get there would be to reconstruct our whole monetary system – say, eliminate paper money and pay negative interest rates on deposits. Another way would be to take advantage of the next boom – whether it’s a bubble or driven by expansionary fiscal policy – to push inflation substantially higher, and keep it there. Or maybe, possibly, we could go theKrugman 1998/Abe 2013 route of pushing up inflation through the sheer power of self-fulfilling expectations.