This research empirically examines supply chain structure, price competition, and supply chain performance using data obtained from the GSAís Federal Supply Service. The preliminary results show positive relationships between supply chain performance and implementation of electronic commerce initiatives to support both transaction and distribution channels. The potential contributions of the research include (1) extending transaction cost economics to a supply chain context with use of multiple transaction technologies and (2) providing additional empirical evidence that supply chain performance is improved and price competition is heightened with the use of electronic transaction systems.