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Vierteljahrshefte zur Wirtschaftsforschung, Vol. 86 (2017), Iss. 1 : pp. 43–53 | First published online: February 16, 2018
Vierteljahrshefte zur Wirtschaftsforschung, Vol. 82 (2013), Iss. 2 : pp. 61–75 | First published online: October 03, 2017