
Banking crisis causes?
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, the prominent financier, avoids using the financial contracts known as derivatives “because we don’t really understand how they work.” , the investment banker who saved New York from financial catastrophe in the 1970s, described derivatives as potential “hydrogen bombs.” And presciently observed five years ago that derivatives were “financial weapons of mass destruction, carrying dangers that, while now latent, are potentially lethal.” One prominent financial figure, however, has long thought otherwise.
Alan Greenspan
The Credit Crisis Is Going to Get Worse - WSJ.com
And I'm afraid they are doing the same thing again in 2009/2010. Let's see when the interest rates increase again... by Jan 8
Survey: IMF Explores Contours of Future Macroeconomic Policy
Olivier Blanchard, normally at MIT but currently the chief economist at the IMF, has released an interesting and important paper on how the crisis has changed, or should have changed, how we think about macroeconomic policy. The most surprising conclusion, presumably, is the idea that central banks have been setting their inflation targets too low:

