Who most benefits from keeping marijuana illegal? The greatest beneficiaries are the major criminal organizations in Mexico and elsewhere that earn billions of dollars annually from this illicit trade - and who would rapidly lose their competitive advantage if marijuana were a legal commodity.

No individual anonymous participant can influence the prices and therefore you really can speculate in the market without paying attention to morality. That's one of the positive features of markets. That's why they function.

China could easily emerge as the great winner if the Chinese leaders handle the situation well. On the other hand, they could also turn out to be the biggest losers if they handle it poorly. If the management turns out be wrong, this could lead to a political crisis in China.

There is a well-established conviction that the central banks always do what is necessary to keep the system going and then afterwards you then take care of the legal aspects. In a crisis, you simply do not have time to think about such concerns for too long.

The main enemy of the open society, I believe, is no longer the communist but the capitalist threat.

This is the joint responsibility of everyone who was involved in the introduction of the euro without understanding the consequences. When the euro was introduced, the regulators allowed banks to buy unlimited amounts of government bonds without setting aside any equity capital. And the European Central Bank discounted all government bonds on equal terms. So commercial banks found it advantageous to accumulate the bonds of the weaker countries to earn a few extra basis points.

I passionately disagreed with Treasury Secretary Hank Paulson's plan to bail out the banks by using a public fund called the Troubled Asset Relief Program (TARP) to help banks take toxic assets off their balance sheets. I argued that it would be much better to put the money where the hole was and replenish the equity of the banks themselves.