Overnight we got the latest proof that there is nothing worse for an economy than to be run by a bunch of central planning academics who get "advice" from Paul Krugman. The reason: Japan's retail sales which crashed by 9.7% Y/Y, the biggest annual drop in history. To be sure, the biggest reason for the annual drop was the base effect with the surge in demand last March ahead of the April 2014 consumption tax hike, but the drop was bigger than what consensus had expected, as expectations were for a -7.3% drop. And confirming that things are getting worse on a sequential basis as well, was the 1.9% drop in sales in March compared to a 0.7% increase in February. In fact, as the chart belows show, on an indexed basis, the March retail sales print was one of the worst since last year's tax hike.