Testing for polynomial versus nonparametric regression using mixed model penalized splines.
ISNI2008 International Seminar on Nonparametric Inference. Vigo, 5-7 November 2008.

Inference on random effect variances with application to the assessment of nonlinearity.
2008 Joint Statistical Meetings. Denver, 3-7 August 2008.

On inference for random effects variances and mixed model penalized splines
Cornell University. Ithaca, 2 April 2008.

Restricted Likelihood Ratio Testing for Zero Variance Components in Linear Mixed Models.
ENAR 2008 Spring Meeting. Arlington, 16-19 March 2008.

Inference in Additive and Linear Mixed Models.
LifeStat 2008 - Statistics and Life Sciences: Perspectives and Challenges. Munich, 10-13 March 2008.

Inference for Random Effects Variances with Application to the Assessment of Nonlinearity in Air Pollution Dose-Response Functions.
Johns Hopkins University. Baltimore, 27 February 2008.

Non-Standard Problems in Inference for Additive and Linear Mixed Models.
Ludwig-Maximilians-University. Munich, 20 December 2007.

Testing for Variance Components in Linear Mixed Models and Assessing the Shape of Air Pollution Dose-Response Functions.
Johns Hopkins University. Baltimore, 16 July 2007.

Likelihood ratio testing for zero variance components in linear mixed models.
22nd International Workshop on Statistical Modelling. Barcelona, 2-6 July 2007.

Testing for Variance Components in Linear Mixed Models and Assessing the Shape of Dose-Response Functions.
The University of Reading. Reading, 23 May 2007.

Testing for Zero Variance Components in Linear Mixed Models.
Ecole Polytechnique Fédérale de Lausanne. Lausanne, 27 April 2007.

Likelihood ratio tests in linear mixed models with more than one variance component.
Statistics under one Umbrella - First joint Statistical Meeting Deutsche Arbeitsgemeinschaft Statistik. Bielefeld, 27-30 March 2007.

Semiparametric Regression and Dose-Response-Functions for the Airgene Study.
Kolloqium Statistische Methoden in der empirischen Forschung. Berlin, 13 February 2007.

Additive Mixed Models for the Airgene Study and Testing of Smooth Dose-Response-Functions.
Ludwig-Maximilians-University. Munich, 2 February 2007.

The Airgene study - Methods and Analyses.
Johns Hopkins University. Baltimore, 9 November 2006.

Additive mixed models with P-Splines.
21st International Workshop on Statistical Modelling. Galway, 3-7 July 2006.

The AIRGENE Study - Analysis Concept and first Results.
German Research Center for Environmental Health. Neuherberg, 23 November 2005.

Airgene Analyses - Methodology and Software.
German Research Center for Environmental Health. Neuherberg, 13 October 2005.

Statistical Aspects in Additive Mixed Models for the AIRGENE Study.
International Workshop on Model Choice and Validation. Munich, 6-8 October 2005.

Statistical Aspects in Additive Mixed Models for the AIRGENE Study.
25th European Meeting of Statisticians. Oslo, 24-28 July 2005.

The Airgene Study: Background and Methods.
Ludwig-Maximilians-University. Munich, 11 May 2005.

Linear Mixed Models for longitudinal Data.
Ludwig-Maximilians-University. Munich, 10 January 2005.