Benedictow, Andreas
Boug, Pål http://orcid.org/0000-0003-3809-982X
Funding for this research was provided by:
Statistics Norway
Article History
Received: 29 January 2018
Accepted: 22 May 2021
First Online: 5 July 2021
Declarations
:
: The authors declare that they have no conflicts of interest.