%0 Book Section %1 WaC09g %A Wagner, R. %B Encyclopedia of Business in Today's World %C Thousand Oaks %D 2009 %E Wankel, Charles %I Sage %K 2009 Wettbewerbsinteraktionen_und_Competitive_Intelligence contributions myown %P 1076-1077 %T Market Imperfections Theory %7 2