SciELO - Scientific Electronic Library Online

vol.7 issue1Exploring Tourist Adoption of Tourism Mobile Payment: An Empirical AnalysisThe Impact of Testimonials on Purchase Intentions in a Mock E-commerce Web Site author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Journal of theoretical and applied electronic commerce research

On-line version ISSN 0718-1876


BERANEK, Ladislav  and  KNIZEK, Jiri. The Usage of Contextual Discounting and Opposition in Determining the Trustfulness of Users in Online Auctions. J. theor. appl. electron. commer. res. [online]. 2012, vol.7, n.1, pp.34-50. ISSN 0718-1876.

The communication within Internet auction systems proceeds as a rule under the situation in which users are not in physical contact nor they do not know anything of each other. They have therefore to rely on reputation mechanisms implemented within these online systems. Such mechanisms help to create a trustworthy environment on the basis of additional attributes associated with users and their roles. The trustworthy environment in online auction systems (trust of the system itself and trust among users of this virtual world) is the essential element for these systems functioning. This paper introduces a trust model based on reputation while it takes into account possible fraudulent behavior of users in online auctions as contextual information. The reputation is calculated from user's evaluations (feedback) following performed transactions. Information about possible fraudulent behavior is additional information determining the reliability of the user's reputation in our trust model. Reputation and fraudulent behavior are expressed in a form of belief functions and the resulting user's trustfulness is calculated. The case study shows that the proposed approach is valid and may be applicable in real online auctions.

Keywords : Reputation; Trust; Online auction; Belief functions; Contextual discounting; Belief discounting.

        · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License