Humboldt-Universität zu Berlin | Wirtschaftswissenschaftliche Fakultät | High Dimensional Nonstationary Time Series | About us | News Feed | News 2017 | Dissertation: F. Schulz completes PhD Dissertation: F. Schulz completes PhD 06.02.2017. Franziska Schulz, IRTG PhD student, ended her doctoral study on "Probabilistic Models in Energy Finance" with a brilliant defense with Summa Cum Laude. Congratulations!