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Achim Wambach
University of Cologne
 
Cologne, 50931
Germany
 
wambach@wiso.uni-koeln.de
 
http://www.uni-koeln.de/wiso-fak/staatssem/index.htm
 
 
 
 
 
JEL Areas:
L8 : Industry Studies: Services: General
D8 : Information, Knowledge, and Uncertainty: General