This special volume presents a select number of psychometric techniques, many of them original, and their implementation in R packages.

Item response theory models (IRT) are increasingly becoming established in social science research, particularly in the analysis of performance or attitudinal data in psychology, education, medicine, marketing and other fields where testing is relevant. We propose the R package eRm (extended...

Background: Researchers in logistics and supply chain management apply a multitude of methods. So far, however, the potential of textual data science has not been fully exploited to automatically analyze large chunks of textual data and to extract relevant insights. Methods: In this paper, we...

Purpose: This paper presents competing risks models, and shows how dwell times can be applied to predict users’ online behavior. This information enables real-time personalization of Web content. Design/methodology/approach: This papers models transitions between pages based upon the dwell...