About the Authors

Zuzanna Kowalik

Contributed equally to this work with: Zuzanna Kowalik, Piotr Lewandowski

Roles Data curation, Formal analysis, Writing – original draft

Affiliation Institute for Structural Research (IBS), Warsaw, Poland

Piotr Lewandowski

Contributed equally to this work with: Zuzanna Kowalik, Piotr Lewandowski

Roles Conceptualization, Formal analysis, Methodology, Writing – original draft

piotr.lewandowski@ibs.org.pl

Affiliations Institute for Structural Research (IBS), Warsaw, Poland, IZA, Bonn, Germany

Competing Interests

The authors have declared that no competing interests exist.