 Introduction o Studies based on rational bidders in auctions1 were widely studied in the 1980s and 1990s in economic journals. Economists believe that sellers prefer auctions in which 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 in which the bidders are large companies. On the other hand, online auctions have properties that differentiate them from traditional auctions. Online auctions have become one of the most successful businesses since the emergence of the Internet. Unlike many other web services which lost popularity (Ariely & Simonson 2005), even after the dotcom bubble. “The best example is eBay, which by 2001 had become a dominant platform for consumer auctions and the third largest website in terms of time spent by consumers2” (Linav, et al., 2013). “Its market trading volume reached $9.3 billion in 2001 (it later increased 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 predominant factor in our economy. Although one of the advantages of online auctions is that bidders do not need to travel long distances to participate1 In this article, whenever we talk about auctions, we mean English second bid auctions. For more information, the following article might be a good source: Auction Theory: A Guide to the Literature (Klemperer, 2009)2 Source: http://blog.compete.com/2007/10/01/top -rank.... .. middle of paper ......tion is necessary. Need data that includes time as a parameter Classification of data could affect the result Price range of products does not is not that broad The approach of bidders cannot be measured (optimistic VS pessimistic) Lack of inclusion of the endowment effect (bidders do not bid in real money, so they skip the step of entry/choice)To conclude, we believe that despite the current trend of online auctions, this type of web service is still the most predominant in e-commerce. Introducing new fields such as information economics could help researchers combine the theoretical material on hand with their empirical evidence. We also believe that behavioral studies could help sellers and auctioneers improve the classification of information they provide to bidders. Further investigation would be followed in the areas of MIS, marketing and economics..