The question Mundell avoids answering is how the central monetary authority, in whatever guise it ends up, will determine the demand for money so as to adjust the supply of money appropriately without inflating or deflating the currency?

FORBES: Mundell's Dollar/Euro Fix Doesn't Fix Our Currency Mess

We believe that supply is not aligned appropriately with demand because of a number of factors, but including obviously unrest in the Middle East and specifically the disruption caused by the removal of 1.5 million barrels a day from the market because of Libya.

WHITEHOUSE: Press Briefing

The other plan endorsed by the European retailers "introduces requirements, including governance and dispute resolution mechanisms, on supply chain matters that are appropriately left to retailers, suppliers and government, and are unnecessary to achieve fire and safety goals, " he said.

WSJ: Wal-Mart Announces Own Bangladesh Safety Plan

For example, the supply of electricity, water and sewage systems are unpredictable and need to be appropriately protected from attack.

ECONOMIST: The conflict over Iraq