96 citations · 128 across the 8 of their papers we have counts for
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stat.AP2021★ 5 cited
Penalized Optimal Scaling for Ordinal Variables with an Application to International Classification of Functioning Core Sets
Aisouda Hoshiyar, Henk A. L. Kiers, Jan Gertheiss
Ordinal data occur frequently in the social sciences. When applying principal component analysis (PCA), however, those data are often treated as numeric implying linear relationshi…
stat.AP2011★ 96 cited
Sparse modeling of categorial explanatory variables
Jan Gertheiss, Gerhard Tutz
Shrinking methods in regression analysis are usually designed for metric predictors. In this article, however, shrinkage methods for categorial predictors are proposed. As an appli…