About the Authors

Marjan Cugmas

Roles Formal analysis, Investigation, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing

marjan.cugmas@fdv.uni-lj.si

Affiliation Faculty of Social Sciences, University of Ljubljana, Ljubljana, Slovenia

Anuška Ferligoj

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing

Affiliations Faculty of Social Sciences, University of Ljubljana, Ljubljana, Slovenia, National Research University Higher School of Economics, Moscow, Russia

Tina Kogovšek

Roles Conceptualization, Data curation, Validation, Writing – original draft

Affiliations Faculty of Social Sciences, University of Ljubljana, Ljubljana, Slovenia, Faculty of Arts, University of Ljubljana, Ljubljana, Slovenia

Zenel Batagelj

Roles Data curation, Resources, Validation

Affiliation Valicon, Ljubljana, Slovenia

Competing Interests

Z.B. is an employee of Valicon. There are no patents, products in development or marketed products to declare. This does not alter our adherence to PLOS ONE policies on sharing data and materials.