9 citations · 36 across the 15 of their papers we have counts for
16 papers
Text Data Analysis and Classification Methods - Insights from Customer Letters in Life Insurance
Andreas Groll, Marie Punsmann, Leonid Zeldin
The business of life insurance companies is characterized by long-term contracts. For this reason, data describing customers is of immense value. A portion of the data provided to…
Model-based bootstrap inference for Cox models after Lasso selection
Lena Schemet, Andreas Groll, Sarah Friedrich-Welz
Inference after variable selection in Cox regression is difficult because simple Wald-type intervals after selection can have poor finite-sample conditional coverage. We study a mo…
Modeling and Prediction of the UEFA EURO 2024 via Combined Statistical Learning Approaches
Andreas Groll, Lars M. Hvattum, Christophe Ley +3
In this work, three fundamentally different machine learning models are combined to create a new, joint model for forecasting the UEFA EURO 2024. Therefore, a generalized linear mo…
Statistically Enhanced Learning: a feature engineering framework to boost (any) learning algorithms
Florian Felice, Christophe Ley, Andreas Groll +1
Feature engineering is of critical importance in the field of Data Science. While any data scientist knows the importance of rigorously preparing data to obtain good performing mod…
Churn modeling of life insurance policies via statistical and machine learning methods -- Analysis of important features
Andreas Groll, Carsten Wasserfuhr, Leonid Zeldin
Life assurance companies typically possess a wealth of data covering multiple systems and databases. These data are often used for analyzing the past and for describing the present…
Machine Learning for Multi-Output Regression: When should a holistic multivariate approach be preferred over separate univariate ones?
Lena Schmid, Alexander Gerharz, Andreas Groll +1
Tree-based ensembles such as the Random Forest are modern classics among statistical learning methods. In particular, they are used for predicting univariate responses. In case of…