Budzinski, Oliver; Ruhmer, Isabel - 2008
Ruhmer
Center for Doctoral Studies in Economics (CDSE)
University of Mannheim
email: iruhmer …-University of Marburg, email: budzinski@wiwi.uni-marburg.de.
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Isabel Ruhmer, Center for Doctoral Studies in Economics (CDSE … persist, but only in the event that an a priori division into
subgroups is reasonable. If products can be classified …