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An Empirical Analysis of Fraud Detection in Online Auctions: Credit Card Phantom Transaction

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4 Author(s)
Myungsin Chae ; Seoul Univ. of Venture & Inf. ; Seonyoung Shim ; Hyungjun Cho ; Byungtae Lee

The online auction is a well-known business model that shows how business can be changed with the aid of new technologies. On the other hand, although the online auction allows buyers to find a wider variety of items and helps sellers to extend to literally millions of buyers, it is also accompanying by a great deal of online auction fraud through the information asymmetry and anonymity problems. As serious online fraud, we deal with the online credit card phantom transaction, which is a fake transaction by the collusion of the seller and buyer using credit card. Basically it is illegal online loan sharking which incurs various social and economic costs: tax evasion, the development of a black-market for the loan service, destruction of debtor's (buyer) financial condition due to the excessively high interest rate. In this paper, we investigated the factors necessary to detect phantom transaction. Based on the studies that have explored the behaviors of buyers and sellers in online auctions, we used the followings as the independent variables: starting bid, auction length, bid count, bid increment, and seller credit. Through empirical bidding data analysis, our logistic regression model suggests the use of 'starting bid', 'auction length' and 'seller credit' as important factors for detection of phantom transaction

Published in:

System Sciences, 2007. HICSS 2007. 40th Annual Hawaii International Conference on

Date of Conference:

Jan. 2007