Paul Krugman, one of the most articulate and accessable economists in the business has plenty of detractors. Stepping on the toes of the would-be exalted is bound to draw some flack. His recent posts concerning the Reinhart-Rogoff fiasco are a case in point.
Responding to Noah Smith, the latest in a long line of critics, Krugman put forth the clearest expostition of his view of the economy and its current troubles yet presented.
This page says it all, and it is a worthy read.