The dollar nevertheless remains the world’s leading reserve currency, with the euro in second place. Investors are naturally anxious to protect themselves against markets, including currency markets, which have shown such a high degree of volatility.

The Chinese, who have the greatest number of dollars in their currency reserves, have already suffered substantial losses.

In what amounts to a crisis of the dollar, the euro is in second place as a reserve currency, but there are potential threats to the future of the euro, due to the weak productivity of the Mediterranean economies.

This is an eye-opener. Whenever I talk about the Great Depression and compare it with what is going on today, I get a lot of skepticism. I hear a lot of people say, definitively, “This isn’t as bad as the Great Depression.”

This week’s Outside the box looks at some very interesting research done by two economic historians, Barry Eichengreen of the University of California at Berkeley and Kevin O’Rourke of Trinity College, Dublin They give us comparisons between the Great Depression and today’s downturn.