Vierteljahrshefte zur Wirtschaftsforschung, Vol. 83 (2014), Iss. 4 : pp. 21–41 | First published online: October 03, 2017
Sozialer Fortschritt, Vol. 67 (2018), Iss. 8-9 : pp. 783–804 | First published online: September 13, 2018
