Leveraging a Social Network of Trust for Promoting Honesty in E-Marketplaces

Abstract : In this paper, we examine a trust-based framework for promoting honesty in e-marketplaces that relies on buyers forming social networks to share reputation ratings of sellers and sellers rewarding the buyers that are most respected within their social networks. We explore how sellers reason about expected future profit when offering particular rewards for buyers. We theoretically prove that in a marketplace operating with our mechanism: i) buyers will be better off honestly reporting seller ratings and ii) sellers are better off being honest, to earn better profit. Experiments confirm the robustness of the approach, in dynamically changing environments. With rational agents preferring to be honest, the buyer and seller strategies as specified constitute an effective approach for the design of e-marketplaces.
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Masakatsu Nishigaki; Audun Jøsang; Yuko Murayama; Stephen Marsh. 4th IFIP WG 11.11 International on Trust Management (TM), Jun 2010, Morioka, Japan. Springer, IFIP Advances in Information and Communication Technology, AICT-321, pp.216-231, 2010, Trust Management IV. 〈10.1007/978-3-642-13446-3_15〉
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Jie Zhang, Robin Cohen, Kate Larson. Leveraging a Social Network of Trust for Promoting Honesty in E-Marketplaces. Masakatsu Nishigaki; Audun Jøsang; Yuko Murayama; Stephen Marsh. 4th IFIP WG 11.11 International on Trust Management (TM), Jun 2010, Morioka, Japan. Springer, IFIP Advances in Information and Communication Technology, AICT-321, pp.216-231, 2010, Trust Management IV. 〈10.1007/978-3-642-13446-3_15〉. 〈hal-01061329〉

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