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The generalized second-price auction (GSP) is a non-truthful auction mechanism for multiple items. Each bidder places a bid. The highest bidder gets the first slot, the second-highest, the second slot and so on, but the highest bidder pays the price bid by the second-highest bidder, the second-highest pays the price bid by the third-highest, and so on.
The auctioneer does not disclose the current maximum bid, but the second highest bid is always public. In proxy bidding, the wise bidder must know in advance the "true" value of an item as a basis for their secret bidding limit. [2] The fact that the maximum bid is revealed when it is outbid introduces the possibility of maximum bid fishing.
This may in the future lead to a standardization of sourcing procedures, reduced order cycle, which can enable businesses to reduce prices and generally provide a higher level of service. [4] In a traditional auction, the seller offers an item for sale. Potential buyers are then free to bid on the item until the time period expires.
In the case of the second-price ruling as in a Vickrey auction, the final price for the winner is based on the second bidder's price. A Proxy bid is a special case of second-price ruling used by eBay, where a predefined increment is added to the second highest bid in response to a yet higher bid.
Auto auctions are the most popular method to sell used vehicles in Japan. [2] Most customers are Japanese seeking a cheap vehicle to start with or replace their older vehicle. There are many also trying to sell their vehicles. Individuals though cannot directly use auto auctions, but must go through those holding auction membership. [3]
Proxy bidding is an implementation of an English second-price auction used on eBay, in which the winning bidder pays the price of the second-highest bid plus a defined increment. It differs from a Vickrey auction in that bids are not sealed ; the "current highest bid" (defined as second-highest bid plus bid increment) is always displayed.
In France, when the last bid has been made in an auction for an art object, a representative of the state can say "Préemption de l'état" ("Pre-emption of the state") and buy the object for the highest bid. [4] Some housing cooperatives similarly allow members of the cooperative to pre-empt any buyer of a house constructed by the cooperative. [5]
The largest consumer-to-consumer online auction site is eBay, which researchers suggest is popular because it is a convenient, efficient, and effective method for buying and selling goods. [ 6 ] Despite the benefits of online auctions, the anonymity of the internet, the large market, and the ease of access makes online auction fraud easier than ...