Johannes Breuer is as a senior researcher in the team Data Augmentation at the GESIS department Survey Data Curation where his work focuses on data linking and the use of digital trace data. He also (co-)leads the team Research Data & Methods at the Center for Advanced Internet Studies (CAIS). He received his Ph.D. in psychology from the University of Cologne. Before joining GESIS, he worked in several research projects investigating the use and effects of digital media. His other research interests include computational methods, data management, and open science.

Stefan Jünger is a postdoctoral researcher in the team Data Linking & Data Security at the GESIS Data Archive working on the use of georeferenced data in social science research. He received his Ph.D. in sociology from the University of Cologne. In addition to his substantive research and his work on the use of georeferenced data in the social sciences, he is also interested in topics of data management and reproducible research.

Veronika Batzdorfer is a postdoctoral researcher in the team Digital Society Observatory at the GESIS department Computational Social Science (with a secondary affiliation also in the team Data Augmentation in the department Survey Data Curation). Her work focuses on joining digital trace data with other data types as well as natural language processing techniques. She has been working at ZPID in the Big Data team before joining GESIS, where she was concerned with modelling temporal dynamics on social media platforms and causal identification. She is interested in topics such as making digital trace data reproducible, Ecological Momentary Assessment and causal graphs (DAGs).