Degree in Statistics from the Universität Dortmund as well as a doctoral thesis on “Heteroskedastie- und Autokorrelationskonsistente Kovarianzmatrixschätzung im linearen Regressionsmodell" (Heteroscedasticity- and autocorrelation consistent covarianz matrix estimation within the linear regression model); managing director for four years at the collaborative research centre "Komplexitätsreduktion in multivariaten Datenstrukturen" (Reduction of complexity in multivariable data structures).

Activity focus at the CHE:

• UniversityRanking, especially the research indicators. Responsible for bibliometric analyses for all disciplines; compilation of the UniversityRanking
  
• within the ExcellenceRanking responsible for data evaluation, pre-selection, data storage and data processing for presentation on the Internet, interviews with master’s and doctoral students
  
• Within the UniversityRanking, many years of monitoring student interviews and the organisation and assessment of data
  
• Co-operation in several statistic assessment projects based on data from the UniversityRanking or other sources.

At CHE-Ranking since September 2000.

• Berghoff, Sonja; Giebisch, Petra; Hachmeister, Cort-Denis; Federkeil, Gero; Müller-Böling, Detlef; Rölle, Daniel: CHE-HochschulRanking 2006
  Vorgehensweise und Indikatoren , Gütersloh, 2006, 81 Seiten,
  ISBN 978-3-939589-27-6,
  ISSN 1862-7188
   Download:
  Methoden 2006.pdf

• Berghoff, Sonja; Federkeil, Gero; Giebisch, Petra; Hachmeister, Cort-Denis; Hennings, Mareike; Müller-Böling, Detlef: Das CHE Forschungsranking deutscher Universitäten 2006, Gütersloh, 2006,
  ISBN 3-939589-34-9,
  ISSN 1862-7188
   Download:
  CHE ForschungsRanking 2006.pdf