die signaling-Funktionen ab. Roman Bartnik, ebenfalls Duisburg-Essen, behandelt 'Außenhandel, Signaling und der deutsche … socio-economic analysis of the German Year, stressing public good-properties and signaling. Roman Bartnik, also from the … University of Duisburg-Essen, contributes a paper on 'Foreign trade, signaling, and the German pavilion - Expo 2005 in Japan from …