Ockenfels, Axel http://orcid.org/0000-0003-1456-0191
Werner, Peter
Edenhofer, Ottmar http://orcid.org/0000-0001-6029-5208
Article History
Received: 6 November 2019
Accepted: 13 May 2020
First Online: 29 June 2020
Competing interests
: The authors declare no competing interests.