The Real Problem was Nominal
A recent series of articles in The Economist argued that the current financial crisis has exposed important flaws in modern economic theory. I will make a slightly different argument. The sub-prime crisis that began in late 2007 was probably just a fluke, and has few important implications for either financial economics or macroeconomics.[1] The much more severe crisis that swept the entire world in late 2008 was a qualitatively different problem, which has been misdiagnosed by those on both the left and the right. Most economists simply assumed that a severe intensification of the financial crisis depressed spending throughout much of the world. In fact, the causation reversed in the second half of 2008, as falling nominal income began worsening the debt crisis....
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