http://www.nytimes.com/2009/01/05/opinion/05krugman.html?_r=1
"Friedmanâs claim that monetary policy could have prevented the Great Depression was an attempt to refute the analysis of John Maynard Keynes, who argued that monetary policy is ineffective under depression conditions and that fiscal policy â large-scale deficit spending by the government â is needed to fight mass unemployment. The failure of monetary policy in the current crisis shows that Keynes had it right the first time. And Keynesian thinking lies behind Mr. Obamaâs plans to rescue the economy."
As usual Krugman is wrong and making biased arguments. He says monetary policy 'failed' this time yet THIS IS NOT the worst recession since WW2 and certainly NOT EVEN remotely close to the great depression, the biggest bears are forecasting a peak to through TOTAL decline in GDP of 5%(compared to 27% of the 30's), which is not a depression, simply a nasty recession. Just when Milton Friedman claimed that monetary policy would prevent recessions or severe recessions from happening ever again?
Krugman just founded a new branch of economics, its based on forward looking opinions that bet on unlikely outcomes and strech reality to the most convinient side then use that as empirical facts to refute theories