Paul Krugman in December 2011 "If I have this right, Olivier is suggesting that harsh austerity programs may be literally self-defeating, hurting the economy so much that they worsen fiscal prospects.
This in turn means that the analogy to medieval doctors who bled their patients, then bled them even more when the bleeding made them sicker, is exactly right: austerity reduces growth prospects, leading to calls for even more austerity."
From Washington Post in January 2013 "The International Monetary Fund’s top economist today acknowledged that the fund blew its forecasts for Greece and other European economies because it did not fully understand how government austerity efforts would undermine economic growth.......
This paper may not be an official position of the IMF, but coming from the agency’s top economist, it is bound to change how the agency generates forecasts."
From The Guardian on April 18, 2013:George Osborne told by IMF chief: rethink your austerity plan
Cornel Ban at Triple Crisis On the Road to Damascus Ambiguity and Continuity at the IMF