Notes, Comments and Preliminary results Jul 16 2017 Eike Emrich , Freya Gassmann and Christian Pierdzioch   Are Forfeitures of Olympic Medals Predictable? – A Test of the Efficiency of the International Anti-Doping System   Abstract  Contact Information  Citation  Full Text  -  Note   Feb 11 2016 Eike Emrich and Christian Pierdzioch   A quantile-regression test of economic models of volunteer labor supply   Abstract  Contact Information  Citation  Full Text  -  Note   Jul 12 2012 Eike Emrich , Markus Klein , Werner Pitsch and Christian Pierdzioch   On the determinants of sporting success – A note on the Olympic Games   Abstract  Contact Information  Citation  Full Text  -  Note