Humboldt-Universität zu Berlin | Wirtschaftswissenschaftliche Fakultät | High Dimensional Nonstationary Time Series | About us | News Feed | News 2018 | Dissertation: S. Chen completes PhD Dissertation: S. Chen completes PhD 08.02.2018 Dissertation: S. Chen completes PhD 17.11.2017. Shi Chen, IRTG PhD student, defended her PhD dissertation on "Risk management" with Summa Cum Laude. Congratulations!