Plümper, Oliver
John, Timm
Podladchikov, Yuri Y. http://orcid.org/0000-0002-6369-7277
Vrijmoed, Johannes C.
Scambelluri, Marco
Article History
Received: 30 July 2016
Accepted: 23 November 2016
First Online: 26 December 2016
Competing interests
: The authors declare no competing financial interests.