TY - GEN U1 - Sonstiges A1 - Knorr, Andreas A1 - Stelkens, Ulrich A1 - Mühlenkamp, Holger T1 - Performance-Oriented Pay as an Effective Leadership Instrument in the Civil Service or "Management by Frustration"? The German Experience of Pay for Performance for University Professors Y1 - 2012 ER -