In terms of adult unemployment rates, the most recent figures for the United States (6.1 percent) and Britain (5.7 percent) are not that far from Germany’s figure of 5.1 percent. The major difference is in youth unemployment, which is above 16 percent in the United States and above 20 percent in Britain.

What accounts for that difference? Some of the credit goes to Germany’s education and employment system for young workers, and to German policies that encourage employers facing downturns to reduce working hours rather than fire workers. In Germany, students are separated into different career tracks, with many put into a system that leads to apprenticeships rather than to college degrees.

But that is not the entire story. The euro zone’s troubles have helped Germany’s export-oriented economy. The weak euro has made Germany’s exports more competitive against those of countries with which it competes, most notably the United States and Japan. Since the end of 2007, the euro is down about 10 percent against the dollar and about 20 percent against the yen.

Were the euro zone to break up, there is little question that the value of a new German mark would rise sharply, while the currencies of many other members of the zone would fall relative both to the mark and other international currencies. That would depress German exports.

The charts reflecting Germany’s unemployment rates, if they were the only evidence available on world economic trends, would seem to indicate there was a mild downturn in 2009 that soon ended, with the economy recovering the next year. The United States charts would indicate a more severe downturn, followed by a recovery that began in 2010 and may now be gathering strength. In Britain, there has been much less progress since unemployment peaked in 2011.