Dr. Manuel Koller

Duties

• October 2008 - September 2009: Member of the statistical consulting group at the Seminar für Statistik.
• October 2009 - December 2012: PhD student and assistant at the Seminar für Statistik.
• October 2010 - August 2012: Coordinator of assistants (Gruppe 2, SfS).

Publications

Publications

• Manuel Koller, Werner A. Stahel, Sharpening Wald-type inference in robust regression for small samples, Computational Statistics & Data Analysis, Volume 55, Issue 8, 1 August 2011, Pages 2504-2515, ISSN 0167-9473, DOI: 10.1016/j.csda.2011.02.014 [version with larger plots, 766 KB].

Preprints

• Manuel Koller, Nonsingular subsampling for S-estimators with categorical predictors, Preprint (2012) arXiv:1208.5595v1.

Talks

• Avoiding the pitfalls of S-estimators with categorical predictors, invited talk, ICORS 2012 in Burlington, VT, USA on 9. August 2012 [abstract.pdf, 115 KB; slides.pdf, 3.6 MB].

• Robust mixed effects models: simulations and limitations, invited talk, ICORS 2012 in Burlington, VT, USA on 8. August 2012 [abstract.pdf, 166 KB; slides.pdf, 2.6 MB].
  
• Robust Estimation of Mixed Models, contributed talk, Summer school of the International Association for Statistical Computing 2011, Katholieke Universiteit Leuven, Belgium on 8. September 2011 [slides.pdf, 2.7 MB].
• Robust regression: the influence of ψ-functions, improving scale and covariance matrix estimates for tests, confidence and prediction intervals, contributed talk, ICORS 2010 in Prague, Czech Republic on 29. June 2010 [abstract.pdf, 86 KB; slides.pdf, 3 MB].
• Inference In Robust Regression: the impact of scale estimation, contributed talk, ICORS 2009 in Parma, Italy on 16. June 2009 [abstract.pdf, 61 KB; slides.pdf, 184 KB].

Master Thesis

• Robust Statistics: Tests for Robust Linear Regression, master thesis, 2008 [.pdf, 3.6 MB].

Software Projects

• R package robustlmm. Robust fitting of linear mixed effects models.
  
• R package robustbase. Author of many extensions to the robust regression fitting function lmrob.
• Git submodule tools. A set of CLI-tools to ease working with git submodules as well as a graphical frontend gitR.