Portfolios of Exchange Relationships: An Empirical Investigation of an Online Marketplace for IT Services

Small firms face distinct problems and opportunities when procuring IT resources. Whereas previous work focused at the level of firm or buyer-supplier dyad, we address portfolios of buyer-supplier relationships at an online marketplace for IT services. Using the portfolio approach, we develop a buyers taxonomy and analyze properties of resulting clusters. Our investigation reveals four clusters of buyers with distinct mixes of long-term and short-term supplier relationships. Although reverse auctions are found to be associated with short-term relationships and negotiations support long-term relationships, buyers in different clusters use the two mechanisms in combination to a different extent.