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Pricing Web Services Günther, Oliver Tamm, Gerrit Leymann, Frank Composite web services pricing This paper focuses on the challenges associated with composing and pricing web services. We present the results of an online experiment, where subjects were confronted with a variety of choices and decisions relating to web service markets and service composition. Our analysis shows that people expect the price of a composite web service to be lower than the sum of the prices of the elementary services, i.e., users are not willing to pay for aggregation by a third party. To obtain a viable business model for composed web services, non-standard pricing mechanisms, such as auctions and negotiations, possibly supported by electronic agents, have to be taken into consideration. Usage-based pricing schemes, combined with an option to switch to a flat subscription, seem most appropriate to penetrate the developing web service market. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Oliver Günther and Gerrit Tamm and Frank Leymann 2006 Is Part Of Dagstuhl Seminar Proceedings, Volume 6291, The Role of Business Processes in Service Oriented Architectures (2006) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/DagSemProc.06291.12 urn:nbn:de:0030-drops-8220 https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.06291.12 eng https://creativecommons.org/licenses/by/4.0/legalcode