URSULA VON DER LEYEN, Germany’s labour minister, likes to point out that the two European Union countries with the lowest unemployment, especially among the young, have dual-education systems: Austria and Germany. Like Switzerland, they have a tradition of combining apprenticeships with formal schooling for the young “so that education is always tied to demand,” she says. When youths graduate, they often have jobs to walk into.With youth unemployment in Germany and Austria below 8% against 56% in Spain and 38% in Italy, Mrs von der Leyen has won Europe’s attention. Germany recently signed memoranda with Greece, Italy, Latvia, Portugal, Slovakia and Spain to help set up vocational-education systems. Mrs von der Leyen discussed the topic in visits to Madrid in May and to Paris this week. There is even talk of a “new deal” for Europe, including bringing youths from crisis-hit countries to work in Germany and making more loans.Germany is best known in euro-zone countries for its macroeconomic prescriptions of austerity and structural reform. So it helps politically that it should now be seen assisting people in those countries into jobs. But does its dual-education system deserve so much credit, and should other countries adopt it?Although based on older traditions, it formally dates from 1969. Youths not interested in, or qualified for, university sign up for a programme in...