Raab, Marcel
Struffolino, Emanuela
Article History
Received: 14 July 2018
Accepted: 24 January 2019
First Online: 6 February 2019
Compliance with Ethical Standards
:
: The authors declare the present work to be compliant with the Ethical Standards of the European Journal of Population. They also declare no conflicts of interest. Ethics approval is not required for this paper.