About the Authors

Brian Joseph Francis

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

Affiliation School of Mathematical Sciences, Lancaster University, Lancaster, United Kingdom

Sylvia Walby

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

Affiliation Department of Law and Criminology, Royal Holloway, University of London, London, United Kingdom.

Competing Interests

The authors have declared that no competing interests exist.