Interesting. My thoughts and questions, from a non-ecconomist non-american:
(Quotes from memory, so not litteral)
Lehman brothers should not have been allowed to go bankrupt. The crash may well have happened, but it would have happened later.
ISTM that it is the nature of bubbles that had it burst later it would have been bigger, and so the fallout would have been greater?
We could have let the shareholders (and a load of other groups the definition of whom I had no idea of) have nothing, but suppored the contractual obligations of the failing banks. This would have prevented the colapes spreading to the whole market.
If this approach had been taken to the whole of the bank bailout scheme, how much money would the (US or international) taxpayer have saved? Who would have lost money?
America has never experienced a drop in house prices (greater than 2 or 3%?).
Is this really true? Not even during the great depresion? The civil war?
Noone expected a drop in house prices
Is this really true? Surely the bubble nature of the property market was at least accepted as a possibility by anyone who was paid to analyze it?
How much did adjustable rate mortgages and balloon mortgages contribute to an unwillingness on the part of the Fed to raise rates in the face of the housing bubble? Since with ARMs and balloons any rate increase on the part of the Fed was certain to cause an increase in foreclosures.
Was the Fed, Greenspan and Bernanke, unwilling to call the bubble because the only tool they had to deal with it would have caused a collapse because of ARMs?
(Sorry if this is OT, I did not see discusion of it in the talk)
You do mean mortgages that are not fixed for decades, that are dependant on either central bank rates or some number that the mortgage company decides on (apparently off the top of their head, but probably a bit more thought out than that

)? Like for example the whole world outside of america thinks of as normal.
Surely if the rest of the world manages to control their base rates with most people having ARMs then america must be able to?
Another related question, how does the ecconomics of these mortgages work in relation to the possibilityof sustained double digit interest rates? Are they underwritten by someone who is suitably hedged against that, or is that another "black swan" that is waiting to bring down the world ecconomy again?