abstract
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Many business-to-business Electronic Marketplaces (EMs) are now offering collaboration functionalities, but the collaboration concept in an EM context has not been studied systematically. This paper is a preliminary effort to explore and categorize the different types of collaboration functionalities that may be offered by EMs. Using a Web survey approach, we identified five types of horizontal collaboration (buying groups) and four kinds of vertical supply chain collaboration in EMs. Our findings suggest that supply chain collaboration tends to be supported more than buying groups by existing EMs, and a high percentage of EMs now offer supply chain coordination and integration. Among online ·buying groups, the exchange-catalogue model is the most popular, possibly since it puts fewer burdens on members and coordinators.