It's 1930 time: "Barry Eichengreen and Kevin O'Rourke have an alarming paper in Vox EU, showing that if you take a global view, the world slump since early 2008 is as bad or worse than the slump from 1929-30. It's full of pictures like this one, showing monthly volume of world trade:
What this says is that the [...]"
(Via Paul Krugman.)