The Editors : Armin Bohnet studied Economics at the University of Mannheim. Since 1973 he has been a Professor for Economics with a focal point on the theory of economic systems and financial science. Matthias Höher, born in 1962, studied geography at the University of Gießen, Ph.D. 1997. Since 2001 he has been the Managing Director of the Center for International Development and Environmental Research (ZEU).