About the Authors

Marcin Kozak

Affiliation Department of Quantitative Methods in Economics, Faculty of Economics, University of Information Technology and Management in Rzeszow, Rzeszów, Poland

Lutz Bornmann


Affiliation Division for Science and Innovation Studies, Administrative Headquarters of the Max Planck Society, Munich, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MK. Performed the experiments: LB. Analyzed the data: MK. Contributed reagents/materials/analysis tools: LB. Wrote the paper: LB MK.