About the Authors

Nenad Živić

Roles Data curation, Formal analysis, Investigation, Methodology, Project administration, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliations Nordeus LLC, Bulevar Mihajla Pupina 165v, Belgrade, Serbia, University of Niš, Faculty of Science and Mathematics, Višegradska 33, Niš, Serbia

Igor Andjelković

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliations Nordeus LLC, Bulevar Mihajla Pupina 165v, Belgrade, Serbia, University of Belgrade, School of Electrical Engineering, Bulevar kralja Aleksandra 73, Belgrade, Serbia

Tolga Özden

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

Affiliation University of Amsterdam, Faculty of Economics, Roetersstraat, 1018 Amsterdam, The Netherlands

Milovan Dekić

Roles Conceptualization, Investigation, Writing – original draft, Writing – review & editing

Affiliations Nordeus LLC, Bulevar Mihajla Pupina 165v, Belgrade, Serbia, University of Belgrade, Faculty of Political Science, Jove Ilića 165, Belgrade, Serbia

Edward Castronova

Roles Conceptualization, Investigation, Project administration, Supervision, Writing – original draft, Writing – review & editing

castro@indiana.edu

Affiliation Indiana University, Media School, 601 E Kirkwood Ave. Bloomington, Indiana, United States of America

Competing Interests

Authors NA, IA and MD are employees of Nordeus LLC, who provided the data. This places a restriction on the authors’ adherence to PLOS ONE policies on sharing data and materials.