Buyer commitment and opportunism in the online market for IT services / Uladzimir Radkevitch, Eric van Heck and Otto KoppiusLeveraging offshore IT outsourcing by SMEs through online marketplaces / Uladzimir Radkevitch, Eric van Heck and Otto KoppiusPortfolios of exchange relationships : an empirical investigation of an online marketplace for IT services / Uladzimir Radkevitch, Eric van Heck and Otto KoppiusChoosing between auctions and negotiations in online B2B markets for IT services: the effect of prior relationships and performance / Uladzimir Radkevitch, Eric van Heck and Otto KoppiusCoping with costly bid evaluation in online reverse auctions for IT services / Uladzimir Radkevitch, Eric van Heck and Otto Koppius