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Vierteljahrshefte zur Wirtschaftsforschung, Vol. 78 (2009), Iss. 4 : pp. 101–118 | First published online: October 03, 2017
Vierteljahrshefte zur Wirtschaftsforschung, Vol. 91 (2022), Iss. 1 : pp. 55–68 | First published online: June 23, 2022