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...

Online markets have dramatically decreased costs of search and communication for buyers. By contrast, costs of evaluating purchasing alternatives have become critical due to an overwhelming range of available options. When high, evaluation costs can offset potential gains from transactions and...