First Online: 3 June 2019
Ethics approval and consent to participate
: Participation in the American Time Use Survey (ATUS) is voluntary and respondent identities are anonymised and confidential. The ATUS is carried out by the US Bureau of Labor Statistics. Participation in the UK and Polish Time Use Surveys is voluntary and respondent identities are anonymised and confidential. The authors obtained all necessary administrative permissions to access the databases used in this study.
: Not applicable.
: The authors declare that they have no competing interests.
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