 Introduction o Studies based on rational bidders in auctions1 were extensively studied in the 1980s and 1990s in Economy Journals. Economists believe that sellers prefer auctions where entry barriers are rather low, which would lead to greater utility for the seller (Bulow, Klemperer 2009). However, these studies mainly focus on large-scale auctions. Large-scale auctions are the type of auctions where the bidders are large companies. On the other hand, online auctions have characteristics that differentiate them from classic auctions. Online auction has become one of the most successful businesses since the advent of the Internet. Unlike many other web services that lost popularity (Ariely & Simonson 2005), even after the dot-com bubble. “The best example is eBay, which by 2001 had become a dominant platform for consumer auctions, and was the third-ranked website in terms of time spent by consumers2” (Linav, et al., 2013). “The market transaction volume reached $9.3 billion in 2001 (subsequently rose to over $67 billion in 2012)” (Linav, et al.,2013). Long before online auctions, people used auctions for almost all types of goods and services (Ockenfels & Reiley & Sadrieh,2006). Previous studies on the history of auctions report (Cassady,1967) that auctions have always been a crucial and prevalent factor in our economy. Although one of the advantages of online auction is that bidders do not have to travel long distances to participate in the auction,1 In this article, whenever we refer to auction, we mean English second bid auctions. For more information the following article could be a good source: Auction theory: a guide to the literature (Klemperer, 2009)2 Source: http://blog.compete.com/2007/10/01/top-rank.. .. .. half of the document ......explanation is necessary. Need for data that includes time as a parameter Data classification could influence the result The price range of the products is not so wide L The bidders' approach cannot be measured (optimistic VS pessimistic) Lack of inclusion of the endowment effect (bidders do not offer real money so they skip the entry/choice phase) To conclude, we believe that despite the current auction trend online, this type of web-based service is still the most predominant in e-commerce. The introduction of new fields such as information economics could help researchers combine available theoretical material with empirical evidence. We also believe that behavioral studies could help sellers and auctioneers improve the classification of information they provide bidders with. Further investigations will be followed in the MIS, Marketing and Economics area.