This memorandum was originally published in German in the Zeitschrift für betriebswirtschaftliche Forschung (zfbf), Volume 62, pp. 662-672 and is translated and reprinted here with the kind permission of Fachverlag der Verlagsgruppe Handelsblatt GmbH. The authors would like to acknowledge the generous assistance of EJIS Senior Associate Editor Nicholas Romano who helped with the translation from the German.
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