A comparative analysis of English Auction and First-price Sealed-bid Auction with Shill Biding

Aimed at the disadvantage of current research of shill bidding with different online auctions types, in this paper, applying decision analysis method and game theory, firstly, we research the bidderpsilas optimal biding strategy on english auction and first-price sealed-bid auction with shill biding. secondly, we discuss the relations between the sellerpsilas revenue and probability of shill biding and commission rate under two important auctions types. finally, we use honest bidderpsilas expected gain and honest sellerpsilas revenue as a basis to compare these two important auctions types, and interpret some bidding behavior in practice and give some suggestion.