Stefan holds a PhD in Econometrics from Aarhus University, Center for Research in Econometric Analysis of Time Series (CREATES), a MSc in Economics and Finance (University of Southern Denmark), and a BSc in Business Administration (University of Southern Denmark). He is an experienced R developer and trainer, and has provided several on-site courses for both large companies, within the public sector, and for academic institutions. Currently Stefan is a Trading Analyst at Danske Commodities. Stefan has also contributed to the R community with the development of packages—e.g. magrittr (with Hadley Wickham), ensurer, import, and more—and by co-founding two useR groups, CopenhagenR and Rhus.