Des Plaines, Ill. -- On Monday Cahners Business Lists debuted its new 1.6 million-name DecisionMaker IT Marketplace Database, which is a joint venture with Boucher Communications. The new database replaces Cahners' Computer Marketplace Database. The DecisionMaker database combines information technology professionals culled from such Cahners publications as Design News and EDN with those culled from such Boucher publications as ENT and Enterprise Systems Journal. The database includes the executives responsible for more than 70% of all purchases made in the U.S. IT market, according to Cahners.