Paul Krugman compares inflation in US and Japan

Paul Krugman, after this piece admitting the general failure of economics, explains in here why inflation in Japan is very low (due to deflation expectations) and why the US will repeat all the way down. Except the future of the US inflation, i.e. deflation starting in  2012, there is no right explanation os the driving force behind price inflation. We explained the case of Japan five years ago, and predicted an extended period of deflation in the US six years ago.