“Reinhart And Rogoff Are Not Happy”

Krugman não dá descanso aos gurus de Vítor Gaspar:

'There is, however, an enormous difference between the statement “countries with debt over 90 percent of GDP tend to have slower growth than countries with debt below 90 percent of GDP” and the statement “growth drops off sharply when debt exceeds 90 percent of GDP”. The former statement is true; the latter isn’t. Yet R&R have repeatedly blurred that distinction, and have continued to do so in recent writings.

And for a country with debt in the vicinity of the 90 percent level — as, for example, in both the US and the UK — the distinction is crucial. It’s the difference between arguing that failure to impose an austerity program amounting to a few percent of GDP might reduce GDP a decade from now by a fraction of a percent at most — which is what the actual correlation suggests — to suggesting that it will reduce future GDP by 10 percent, which is what the threshold claim suggests.'