Economics rightly comes in for a lot of stick for failing to appreciate the possibility of a financial crash before 2007/8. However it is important to ask whether things would have been very different if it had. What has happened to financial regulation after the crash is a clear indication that it would have made very little difference.
There is one simple and straightforward measure that would go a long way to avoiding another global financial crisis, and that is to substantially increase the proportion of bank equity that banks are obliged to hold. This point is put forcibly, and in plain language, in a recent book by Admati and Hellwig: The Bankers New Clothes. Admati and Hellwig suggest the proportion of the balance sheet that is backed by equity should be something like 25%, and other estimates for the optimal amount of bank equity come up with similar numbers. The numbers that regulators are intending to impose post-crisis are tiny in comparison.
Πηγή: mainlymacro.blogspot.gr