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Sozialer Fortschritt, Vol. 72 (2023), Iss. 7–8 : pp. 653–670 | First published online: August 23, 2023
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Vierteljahrshefte zur Wirtschaftsforschung, Vol. 80 (2011), Iss. 1 : pp. 23–33 | First published online: October 03, 2017
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