Ludger Woesmann, Wolfgang Schäuble, Jens Weidmann, Edmund Phelps, James Poterba, Assaf Razin, Harold James, Peter Diamond, David E. Wildasin, Wolfgang Wiegard, Gabriel Felbermayr, Wilhelm Kohler, Rick van der Ploeg, Nicholas Stern, Clemens Fuest, et al.
CESifo Forum 17, May 2016, special issue